diff --git a/compatibility_matrices/compatibility_matrix.4.xml b/compatibility_matrices/compatibility_matrix.4.xml
index bb7637ae2b..952f53d19a 100644
--- a/compatibility_matrices/compatibility_matrix.4.xml
+++ b/compatibility_matrices/compatibility_matrix.4.xml
@@ -1,5 +1,5 @@
 <compatibility-matrix version="1.0" type="framework" level="4">
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.atrace</name>
         <version>1.0</version>
         <interface>
@@ -7,7 +7,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio</name>
         <version>5.0</version>
         <interface>
@@ -15,7 +15,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio.effect</name>
         <version>5.0</version>
         <interface>
@@ -23,7 +23,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.authsecret</name>
         <version>1.0</version>
         <interface>
@@ -31,7 +31,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.audiocontrol</name>
         <version>1.0</version>
         <interface>
@@ -39,7 +39,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.evs</name>
         <version>1.0</version>
         <interface>
@@ -47,7 +47,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.vehicle</name>
         <version>2.0</version>
         <interface>
@@ -55,7 +55,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.face</name>
         <version>1.0</version>
         <interface>
@@ -63,7 +63,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2.1</version>
         <interface>
@@ -71,7 +71,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth</name>
         <version>1.0</version>
         <interface>
@@ -79,7 +79,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth.audio</name>
         <version>2.0</version>
         <interface>
@@ -87,7 +87,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.boot</name>
         <version>1.0</version>
         <interface>
@@ -95,7 +95,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>1.0-1</version>
         <interface>
@@ -103,7 +103,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>2.0</version>
         <interface>
@@ -111,7 +111,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.camera.provider</name>
         <version>2.4-5</version>
         <interface>
@@ -119,7 +119,7 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.cas</name>
         <version>1.1</version>
         <interface>
@@ -127,7 +127,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.configstore</name>
         <version>1.1</version>
         <interface>
@@ -135,7 +135,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.confirmationui</name>
         <version>1.0</version>
         <interface>
@@ -143,7 +143,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.contexthub</name>
         <version>1.0</version>
         <interface>
@@ -151,7 +151,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.drm</name>
         <version>1.0-2</version>
         <interface>
@@ -163,7 +163,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.dumpstate</name>
         <version>1.0</version>
         <interface>
@@ -171,7 +171,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gatekeeper</name>
         <version>1.0</version>
         <interface>
@@ -179,7 +179,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gnss</name>
         <version>2.0</version>
         <interface>
@@ -190,7 +190,7 @@
     <!-- Either the AIDL or the HIDL allocator HAL must exist on the device.
          If the HIDL composer HAL exists, it must be at least version 2.0.
          See DeviceManifestTest.GrallocHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <version>2.0</version>
         <version>3.0</version>
@@ -199,7 +199,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.composer</name>
         <version>2.1-3</version>
         <interface>
@@ -207,7 +207,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <version>2.1</version>
         <version>3.0</version>
@@ -219,7 +219,7 @@
     <!-- Either the AIDL or the HIDL health HAL must exist on the device.
          If the HIDL health HAL exists, it must be at least version 2.0.
          See DeviceManifestTest.HealthHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.health</name>
         <version>2.0</version>
         <interface>
@@ -227,7 +227,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.health.storage</name>
         <version>1.0</version>
         <interface>
@@ -235,7 +235,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.ir</name>
         <version>1.0</version>
         <interface>
@@ -243,7 +243,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.input.classifier</name>
         <version>1.0</version>
         <interface>
@@ -251,7 +251,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>3.0</version>
         <version>4.0</version>
@@ -260,7 +260,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>4.0</version>
         <interface>
@@ -268,7 +268,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.light</name>
         <version>2.0</version>
         <interface>
@@ -276,7 +276,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0</version>
         <interface>
@@ -291,7 +291,7 @@
             <instance>software</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <version>1.0</version>
         <interface>
@@ -303,7 +303,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.memtrack</name>
         <version>1.0</version>
         <interface>
@@ -311,7 +311,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.neuralnetworks</name>
         <version>1.0-2</version>
         <interface>
@@ -319,7 +319,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.nfc</name>
         <version>1.2</version>
         <interface>
@@ -327,7 +327,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.oemlock</name>
         <version>1.0</version>
         <interface>
@@ -335,7 +335,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.power</name>
         <version>1.0-3</version>
         <interface>
@@ -343,7 +343,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.power.stats</name>
         <version>1.0</version>
         <interface>
@@ -351,7 +351,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.4</version>
         <interface>
@@ -361,7 +361,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.2</version>
         <interface>
@@ -370,7 +370,7 @@
             <instance>slot2</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio.config</name>
         <!--
         Note: Devices launching with target-level 4, if implementing the
@@ -384,7 +384,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.renderscript</name>
         <version>1.0</version>
         <interface>
@@ -392,7 +392,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.secure_element</name>
         <version>1.0</version>
         <interface>
@@ -401,7 +401,7 @@
             <regex-instance>SIM[1-9][0-9]*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.sensors</name>
         <version>1.0</version>
         <version>2.0</version>
@@ -410,7 +410,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.soundtrigger</name>
         <version>2.0-2</version>
         <interface>
@@ -418,7 +418,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.config</name>
         <version>1.0</version>
         <interface>
@@ -426,7 +426,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.control</name>
         <version>1.0</version>
         <interface>
@@ -434,7 +434,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.thermal</name>
         <version>2.0</version>
         <interface>
@@ -442,7 +442,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.cec</name>
         <version>1.0</version>
         <interface>
@@ -450,7 +450,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.input</name>
         <version>1.0</version>
         <interface>
@@ -458,7 +458,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb</name>
         <version>1.0-2</version>
         <interface>
@@ -466,7 +466,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb.gadget</name>
         <version>1.0</version>
         <interface>
@@ -474,7 +474,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.vibrator</name>
         <version>1.0-3</version>
         <interface>
@@ -482,7 +482,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.vr</name>
         <version>1.0</version>
         <interface>
@@ -490,7 +490,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.weaver</name>
         <version>1.0</version>
         <interface>
@@ -498,7 +498,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi</name>
         <version>1.0-3</version>
         <interface>
@@ -506,7 +506,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.hostapd</name>
         <version>1.0-1</version>
         <interface>
@@ -514,7 +514,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.supplicant</name>
         <version>1.0-2</version>
         <interface>
diff --git a/compatibility_matrices/compatibility_matrix.5.xml b/compatibility_matrices/compatibility_matrix.5.xml
index dad15589fd..1cf98b0f3c 100644
--- a/compatibility_matrices/compatibility_matrix.5.xml
+++ b/compatibility_matrices/compatibility_matrix.5.xml
@@ -1,5 +1,5 @@
 <compatibility-matrix version="1.0" type="framework" level="5">
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.atrace</name>
         <version>1.0</version>
         <interface>
@@ -7,7 +7,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio</name>
         <version>6.0</version>
         <interface>
@@ -15,7 +15,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio.effect</name>
         <version>6.0</version>
         <interface>
@@ -23,7 +23,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.authsecret</name>
         <version>1.0</version>
         <interface>
@@ -31,7 +31,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.audiocontrol</name>
         <version>1.0</version>
         <version>2.0</version>
@@ -40,7 +40,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.can</name>
         <version>1.0</version>
         <interface>
@@ -52,7 +52,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.evs</name>
         <version>1.0-1</version>
         <interface>
@@ -61,14 +61,14 @@
             <regex-instance>[a-z]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.occupant_awareness</name>
         <interface>
             <name>IOccupantAwareness</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.sv</name>
         <version>1.0</version>
         <interface>
@@ -76,7 +76,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.vehicle</name>
         <version>2.0</version>
         <interface>
@@ -84,7 +84,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.face</name>
         <version>1.0</version>
         <interface>
@@ -92,7 +92,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2.1-2</version>
         <interface>
@@ -100,7 +100,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth</name>
         <version>1.0-1</version>
         <interface>
@@ -108,7 +108,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth.audio</name>
         <version>2.0</version>
         <interface>
@@ -116,7 +116,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.boot</name>
         <version>1.1</version>
         <interface>
@@ -124,7 +124,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>1.0-1</version>
         <interface>
@@ -132,7 +132,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>2.0</version>
         <interface>
@@ -140,7 +140,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.camera.provider</name>
         <version>2.4-6</version>
         <interface>
@@ -148,7 +148,7 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.cas</name>
         <version>1.1-2</version>
         <interface>
@@ -156,7 +156,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.confirmationui</name>
         <version>1.0</version>
         <interface>
@@ -164,7 +164,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.contexthub</name>
         <version>1.0-1</version>
         <interface>
@@ -172,7 +172,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.drm</name>
         <version>1.3</version>
         <interface>
@@ -184,7 +184,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.dumpstate</name>
         <version>1.1</version>
         <interface>
@@ -192,7 +192,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gatekeeper</name>
         <version>1.0</version>
         <interface>
@@ -200,7 +200,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gnss</name>
         <version>2.0-1</version>
         <interface>
@@ -211,7 +211,7 @@
     <!-- Either the AIDL or the HIDL allocator HAL must exist on the device.
          If the HIDL composer HAL exists, it must be at least version 2.0.
          See DeviceManifestTest.GrallocHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.0</version>
@@ -222,7 +222,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.composer</name>
         <version>2.1-4</version>
         <interface>
@@ -230,7 +230,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.1</version>
@@ -244,7 +244,7 @@
     <!-- Either the AIDL or the HIDL health HAL must exist on the device.
          If the HIDL health HAL exists, it must be at least version 2.1.
          See DeviceManifestTest.HealthHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.health</name>
         <version>2.1</version>
         <interface>
@@ -252,7 +252,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.health.storage</name>
         <version>1.0</version>
         <interface>
@@ -260,7 +260,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.identity</name>
         <!--
           b/178458001: identity V2 is introduced in R, but Android R VINTF does not support AIDL
@@ -274,7 +274,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.ir</name>
         <version>1.0</version>
         <interface>
@@ -282,7 +282,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.input.classifier</name>
         <version>1.0</version>
         <interface>
@@ -290,7 +290,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>3.0</version>
         <version>4.0-1</version>
@@ -299,7 +299,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>4.0-1</version>
         <interface>
@@ -307,14 +307,14 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.light</name>
         <interface>
             <name>ILights</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0-1</version>
         <interface>
@@ -324,7 +324,7 @@
             <regex-instance>vendor[0-9]*_software</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0</version>
         <interface>
@@ -333,7 +333,7 @@
             <instance>software</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <version>1.0</version>
         <interface>
@@ -345,7 +345,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.memtrack</name>
         <version>1.0</version>
         <interface>
@@ -353,7 +353,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.neuralnetworks</name>
         <version>1.0-3</version>
         <interface>
@@ -361,7 +361,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.nfc</name>
         <version>1.2</version>
         <interface>
@@ -369,7 +369,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.oemlock</name>
         <version>1.0</version>
         <interface>
@@ -377,14 +377,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power</name>
         <interface>
             <name>IPower</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.power.stats</name>
         <version>1.0</version>
         <interface>
@@ -392,7 +392,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.4</version>
         <version>1.5</version>
@@ -403,7 +403,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.2</version>
         <interface>
@@ -412,7 +412,7 @@
             <instance>slot2</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio.config</name>
         <!--
         See compatibility_matrix.4.xml on versioning of radio config HAL.
@@ -423,7 +423,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.renderscript</name>
         <version>1.0</version>
         <interface>
@@ -431,14 +431,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.rebootescrow</name>
         <interface>
             <name>IRebootEscrow</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.secure_element</name>
         <version>1.0-2</version>
         <interface>
@@ -447,7 +447,7 @@
             <regex-instance>SIM[1-9][0-9]*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.sensors</name>
         <version>1.0</version>
         <version>2.0-1</version>
@@ -456,7 +456,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.soundtrigger</name>
         <version>2.0-3</version>
         <interface>
@@ -464,7 +464,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.config</name>
         <version>1.0</version>
         <interface>
@@ -472,7 +472,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.control</name>
         <version>1.0</version>
         <interface>
@@ -480,7 +480,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.thermal</name>
         <version>2.0</version>
         <interface>
@@ -488,7 +488,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.cec</name>
         <version>1.0</version>
         <interface>
@@ -496,7 +496,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.input</name>
         <version>1.0</version>
         <interface>
@@ -504,7 +504,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.tuner</name>
         <version>1.0</version>
         <interface>
@@ -512,7 +512,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb</name>
         <version>1.0-2</version>
         <interface>
@@ -520,7 +520,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb.gadget</name>
         <version>1.0-1</version>
         <interface>
@@ -528,14 +528,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <interface>
             <name>IVibrator</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.vr</name>
         <version>1.0</version>
         <interface>
@@ -543,7 +543,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.weaver</name>
         <version>1.0</version>
         <interface>
@@ -551,7 +551,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi</name>
         <version>1.0-4</version>
         <interface>
@@ -559,7 +559,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.hostapd</name>
         <version>1.0-2</version>
         <interface>
@@ -567,7 +567,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.supplicant</name>
         <version>1.0-3</version>
         <interface>
diff --git a/compatibility_matrices/compatibility_matrix.6.xml b/compatibility_matrices/compatibility_matrix.6.xml
index 23f634d5b1..fdd7952503 100644
--- a/compatibility_matrices/compatibility_matrix.6.xml
+++ b/compatibility_matrices/compatibility_matrix.6.xml
@@ -1,5 +1,5 @@
 <compatibility-matrix version="1.0" type="framework" level="6">
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.atrace</name>
         <version>1.0</version>
         <interface>
@@ -7,7 +7,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio</name>
         <version>6.0</version>
         <version>7.0</version>
@@ -16,7 +16,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio.effect</name>
         <version>6.0</version>
         <version>7.0</version>
@@ -25,7 +25,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
          <name>android.hardware.authsecret</name>
          <version>1</version>
          <interface>
@@ -33,7 +33,7 @@
              <instance>default</instance>
          </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.authsecret</name>
         <version>1.0</version>
         <interface>
@@ -41,14 +41,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.audiocontrol</name>
         <interface>
             <name>IAudioControl</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.can</name>
         <version>1.0</version>
         <interface>
@@ -60,7 +60,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.evs</name>
         <version>1.0-1</version>
         <interface>
@@ -69,7 +69,7 @@
             <regex-instance>[a-z]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.occupant_awareness</name>
         <version>1</version>
         <interface>
@@ -77,7 +77,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.sv</name>
         <version>1.0</version>
         <interface>
@@ -85,7 +85,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.vehicle</name>
         <version>2.0</version>
         <interface>
@@ -93,7 +93,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.face</name>
         <version>1.0</version>
         <interface>
@@ -101,14 +101,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.biometrics.face</name>
         <interface>
             <name>IFace</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2.1-3</version>
         <interface>
@@ -116,14 +116,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <interface>
             <name>IFingerprint</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth</name>
         <version>1.0-1</version>
         <interface>
@@ -131,7 +131,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth.audio</name>
         <version>2.0-1</version>
         <interface>
@@ -139,7 +139,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.boot</name>
         <version>1.2</version>
         <interface>
@@ -147,7 +147,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>1.0-1</version>
         <interface>
@@ -155,7 +155,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>2.0</version>
         <interface>
@@ -163,7 +163,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.camera.provider</name>
         <version>2.4-7</version>
         <interface>
@@ -171,7 +171,7 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.cas</name>
         <version>1.1-2</version>
         <interface>
@@ -179,7 +179,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.confirmationui</name>
         <version>1.0</version>
         <interface>
@@ -187,7 +187,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.contexthub</name>
         <version>1.2</version>
         <interface>
@@ -195,7 +195,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.drm</name>
         <version>1.3-4</version>
         <interface>
@@ -207,7 +207,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.dumpstate</name>
         <version>1.1</version>
         <interface>
@@ -215,7 +215,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gatekeeper</name>
         <version>1.0</version>
         <interface>
@@ -223,7 +223,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gnss</name>
         <version>2.0-1</version>
         <interface>
@@ -231,7 +231,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.gnss</name>
         <interface>
             <name>IGnss</name>
@@ -241,7 +241,7 @@
     <!-- Either the AIDL or the HIDL allocator HAL must exist on the device.
          If the HIDL composer HAL exists, it must be at least version 2.0.
          See DeviceManifestTest.GrallocHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.0</version>
@@ -252,7 +252,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.composer</name>
         <version>2.1-4</version>
         <interface>
@@ -260,7 +260,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.1</version>
@@ -274,7 +274,7 @@
     <!-- Either the AIDL or the HIDL health HAL must exist on the device.
          If the HIDL health HAL exists, it must be at least version 2.1.
          See DeviceManifestTest.HealthHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.health</name>
         <version>2.1</version>
         <interface>
@@ -282,7 +282,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.health.storage</name>
         <version>1</version>
         <interface>
@@ -290,7 +290,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.identity</name>
         <version>1-3</version>
         <interface>
@@ -298,7 +298,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.oemlock</name>
         <version>1</version>
         <interface>
@@ -306,7 +306,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.ir</name>
         <version>1.0</version>
         <interface>
@@ -314,7 +314,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.input.classifier</name>
         <version>1.0</version>
         <interface>
@@ -322,7 +322,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>3.0</version>
         <version>4.0-1</version>
@@ -331,7 +331,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>4.0-1</version>
         <interface>
@@ -339,7 +339,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.keymint</name>
         <version>1</version>
         <interface>
@@ -348,14 +348,14 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.keymint</name>
         <interface>
             <name>IRemotelyProvisionedComponent</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.light</name>
         <version>1</version>
         <interface>
@@ -363,7 +363,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0-2</version>
         <interface>
@@ -373,7 +373,7 @@
             <regex-instance>vendor[0-9]*_software</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0</version>
         <interface>
@@ -382,7 +382,7 @@
             <instance>software</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <version>1.0</version>
         <interface>
@@ -394,7 +394,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.memtrack</name>
         <version>1</version>
         <interface>
@@ -402,7 +402,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.neuralnetworks</name>
         <version>1.0-3</version>
         <interface>
@@ -410,14 +410,14 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.neuralnetworks</name>
         <interface>
             <name>IDevice</name>
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.nfc</name>
         <version>1.2</version>
         <interface>
@@ -425,7 +425,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.oemlock</name>
         <version>1.0</version>
         <interface>
@@ -433,7 +433,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power</name>
         <version>1-2</version>
         <interface>
@@ -441,14 +441,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power.stats</name>
         <interface>
             <name>IPowerStats</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.6</version>
         <interface>
@@ -458,7 +458,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.2</version>
         <interface>
@@ -467,7 +467,7 @@
             <instance>slot2</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio.config</name>
         <!--
         See compatibility_matrix.4.xml on versioning of radio config HAL.
@@ -478,7 +478,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio.config</name>
         <version>1.3</version>
         <interface>
@@ -486,7 +486,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.renderscript</name>
         <version>1.0</version>
         <interface>
@@ -494,7 +494,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.rebootescrow</name>
         <version>1</version>
         <interface>
@@ -502,7 +502,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.secure_element</name>
         <version>1.0-2</version>
         <interface>
@@ -511,7 +511,7 @@
             <regex-instance>SIM[1-9][0-9]*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.secureclock</name>
         <version>1</version>
         <interface>
@@ -519,7 +519,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.sharedsecret</name>
         <version>1</version>
         <interface>
@@ -528,7 +528,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.sensors</name>
         <version>1.0</version>
         <version>2.0-1</version>
@@ -537,7 +537,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.soundtrigger</name>
         <version>2.3</version>
         <interface>
@@ -545,7 +545,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.config</name>
         <version>1.0</version>
         <interface>
@@ -553,7 +553,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.control</name>
         <version>1.1</version>
         <interface>
@@ -561,7 +561,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.thermal</name>
         <version>2.0</version>
         <interface>
@@ -569,7 +569,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.cec</name>
         <version>1.0-1</version>
         <interface>
@@ -577,7 +577,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.input</name>
         <version>1.0</version>
         <interface>
@@ -585,7 +585,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.tuner</name>
         <version>1.0-1</version>
         <interface>
@@ -593,7 +593,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb</name>
         <version>1.0-3</version>
         <interface>
@@ -601,7 +601,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb.gadget</name>
         <version>1.0-2</version>
         <interface>
@@ -609,7 +609,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -617,7 +617,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -625,7 +625,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.weaver</name>
         <version>1.0</version>
         <interface>
@@ -633,7 +633,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.weaver</name>
         <version>1</version>
         <interface>
@@ -641,7 +641,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi</name>
         <version>1.3-5</version>
         <interface>
@@ -649,7 +649,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.hostapd</name>
         <version>1.0-3</version>
         <interface>
@@ -657,7 +657,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi.supplicant</name>
         <version>1.2-4</version>
         <interface>
diff --git a/compatibility_matrices/compatibility_matrix.7.xml b/compatibility_matrices/compatibility_matrix.7.xml
index fe424bdfc6..8dcc4ae46a 100644
--- a/compatibility_matrices/compatibility_matrix.7.xml
+++ b/compatibility_matrices/compatibility_matrix.7.xml
@@ -1,5 +1,5 @@
 <compatibility-matrix version="1.0" type="framework" level="7">
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.atrace</name>
         <version>1.0</version>
         <interface>
@@ -7,7 +7,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio</name>
         <version>6.0</version>
         <version>7.0-1</version>
@@ -16,7 +16,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio.effect</name>
         <version>6.0</version>
         <version>7.0</version>
@@ -25,7 +25,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
          <name>android.hardware.authsecret</name>
          <version>1</version>
          <interface>
@@ -33,7 +33,7 @@
              <instance>default</instance>
          </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.authsecret</name>
         <version>1.0</version>
         <interface>
@@ -41,7 +41,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.audiocontrol</name>
         <version>1-2</version>
         <interface>
@@ -49,7 +49,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.can</name>
         <version>1.0</version>
         <interface>
@@ -61,7 +61,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.evs</name>
         <interface>
             <name>IEvsEnumerator</name>
@@ -69,7 +69,7 @@
             <regex-instance>[a-z]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.evs</name>
         <version>1.0-1</version>
         <interface>
@@ -78,7 +78,7 @@
             <regex-instance>[a-z]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.occupant_awareness</name>
         <version>1</version>
         <interface>
@@ -86,14 +86,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.vehicle</name>
         <interface>
             <name>IVehicle</name>
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.automotive.vehicle</name>
         <version>2.0</version>
         <interface>
@@ -101,7 +101,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.face</name>
         <version>1.0</version>
         <interface>
@@ -109,7 +109,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.biometrics.face</name>
         <version>2</version>
         <interface>
@@ -117,7 +117,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2.1-3</version>
         <interface>
@@ -125,7 +125,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2</version>
         <interface>
@@ -133,7 +133,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth</name>
         <version>1.0-1</version>
         <interface>
@@ -141,7 +141,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.bluetooth.audio</name>
         <version>2</version>
         <interface>
@@ -149,7 +149,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.boot</name>
         <version>1.2</version>
         <interface>
@@ -157,7 +157,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>1.0-1</version>
         <interface>
@@ -165,7 +165,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.broadcastradio</name>
         <version>2.0</version>
         <interface>
@@ -173,7 +173,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.camera.provider</name>
         <version>2.4-7</version>
         <interface>
@@ -181,7 +181,7 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.camera.provider</name>
         <version>1</version>
         <interface>
@@ -189,7 +189,7 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.cas</name>
         <version>1.1-2</version>
         <interface>
@@ -197,7 +197,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.confirmationui</name>
         <version>1.0</version>
         <interface>
@@ -205,14 +205,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.contexthub</name>
         <interface>
             <name>IContextHub</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.drm</name>
         <version>1</version>
         <interface>
@@ -220,7 +220,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.drm</name>
         <version>1.3-4</version>
         <interface>
@@ -232,14 +232,14 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.dumpstate</name>
         <interface>
             <name>IDumpstateDevice</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gatekeeper</name>
         <version>1.0</version>
         <interface>
@@ -247,7 +247,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.gnss</name>
         <version>2.0-1</version>
         <interface>
@@ -255,7 +255,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.gnss</name>
         <version>2</version>
         <interface>
@@ -263,7 +263,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <!-- New, non-Go devices should use 4.0 or the AIDL hal. -->
         <version>2.0</version>
@@ -274,7 +274,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.graphics.allocator</name>
         <version>1</version>
         <interface>
@@ -285,7 +285,7 @@
     <!-- Either the AIDL or the HIDL composer HAL must exist on the device.
          If the HIDL composer HAL exists, it must be at least version 2.1.
          See DeviceManifestTest.ComposerHal -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.composer</name>
         <version>2.1-4</version>
         <interface>
@@ -293,7 +293,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.graphics.composer3</name>
         <version>1</version>
         <interface>
@@ -301,7 +301,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.1</version>
@@ -312,7 +312,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.health</name>
         <version>1</version>
         <interface>
@@ -320,7 +320,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.health.storage</name>
         <version>1</version>
         <interface>
@@ -328,7 +328,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.identity</name>
         <version>1-4</version>
         <interface>
@@ -336,14 +336,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.net.nlinterceptor</name>
         <interface>
             <name>IInterceptor</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.oemlock</name>
         <version>1</version>
         <interface>
@@ -351,7 +351,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.ir</name>
         <version>1</version>
         <interface>
@@ -359,7 +359,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.input.processor</name>
         <version>1</version>
         <interface>
@@ -367,7 +367,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>3.0</version>
         <version>4.0-1</version>
@@ -376,7 +376,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <version>4.0-1</version>
         <interface>
@@ -384,7 +384,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.keymint</name>
         <version>1-2</version>
         <interface>
@@ -393,7 +393,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.keymint</name>
         <version>1-2</version>
         <interface>
@@ -402,7 +402,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.light</name>
         <version>1-2</version>
         <interface>
@@ -410,7 +410,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0-2</version>
         <interface>
@@ -420,7 +420,7 @@
             <regex-instance>vendor[0-9]*_software</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0</version>
         <interface>
@@ -429,7 +429,7 @@
             <instance>software</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <version>1.0</version>
         <interface>
@@ -441,7 +441,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.memtrack</name>
         <version>1</version>
         <interface>
@@ -449,7 +449,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.neuralnetworks</name>
         <version>1.0-3</version>
         <interface>
@@ -457,7 +457,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.neuralnetworks</name>
         <version>1-4</version>
         <interface>
@@ -465,7 +465,7 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.nfc</name>
         <version>1.2</version>
         <interface>
@@ -473,14 +473,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.nfc</name>
         <interface>
             <name>INfc</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.oemlock</name>
         <version>1.0</version>
         <interface>
@@ -488,7 +488,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power</name>
         <version>2-3</version>
         <interface>
@@ -496,14 +496,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power.stats</name>
         <interface>
             <name>IPowerStats</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.config</name>
         <version>1</version>
         <interface>
@@ -511,7 +511,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.data</name>
         <version>1</version>
         <interface>
@@ -521,7 +521,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.messaging</name>
         <version>1</version>
         <interface>
@@ -531,7 +531,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.modem</name>
         <version>1</version>
         <interface>
@@ -541,7 +541,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.network</name>
         <version>1</version>
         <interface>
@@ -551,7 +551,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.sim</name>
         <version>1</version>
         <interface>
@@ -561,7 +561,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.voice</name>
         <version>1</version>
         <interface>
@@ -571,7 +571,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.radio</name>
         <version>1.2</version>
         <interface>
@@ -580,7 +580,7 @@
             <instance>slot2</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.renderscript</name>
         <version>1.0</version>
         <interface>
@@ -588,7 +588,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.rebootescrow</name>
         <version>1</version>
         <interface>
@@ -596,7 +596,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.secure_element</name>
         <version>1.0-2</version>
         <interface>
@@ -605,7 +605,7 @@
             <regex-instance>SIM[1-9][0-9]*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.secureclock</name>
         <version>1</version>
         <interface>
@@ -613,7 +613,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.security.sharedsecret</name>
         <version>1</version>
         <interface>
@@ -622,14 +622,14 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.sensors</name>
         <interface>
             <name>ISensors</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.sensors</name>
         <version>1.0</version>
         <version>2.0-1</version>
@@ -638,7 +638,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.soundtrigger</name>
         <version>2.3</version>
         <interface>
@@ -646,7 +646,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
          <name>android.hardware.soundtrigger3</name>
          <version>1</version>
          <interface>
@@ -654,7 +654,7 @@
              <instance>default</instance>
          </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.config</name>
         <version>1.0</version>
         <interface>
@@ -662,7 +662,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.control</name>
         <version>1.1</version>
         <interface>
@@ -670,7 +670,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.thermal</name>
         <version>2.0</version>
         <interface>
@@ -678,7 +678,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.cec</name>
         <version>1.0-1</version>
         <interface>
@@ -686,7 +686,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.input</name>
         <version>1.0</version>
         <interface>
@@ -694,7 +694,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tv.tuner</name>
         <version>1.0-1</version>
         <interface>
@@ -702,7 +702,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.tuner</name>
         <version>1</version>
         <interface>
@@ -710,7 +710,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb</name>
         <version>1.0-3</version>
         <interface>
@@ -718,14 +718,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.usb</name>
         <interface>
             <name>IUsb</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.usb.gadget</name>
         <version>1.0-2</version>
         <interface>
@@ -733,7 +733,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -741,7 +741,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -749,7 +749,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.weaver</name>
         <version>1.0</version>
         <interface>
@@ -757,7 +757,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.weaver</name>
         <version>1</version>
         <interface>
@@ -765,7 +765,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.wifi</name>
         <version>1.3-6</version>
         <interface>
@@ -773,7 +773,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.uwb</name>
         <version>1</version>
         <interface>
@@ -781,7 +781,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.wifi.hostapd</name>
         <version>1</version>
         <interface>
@@ -789,7 +789,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.wifi.supplicant</name>
         <interface>
             <name>ISupplicant</name>
diff --git a/compatibility_matrices/compatibility_matrix.8.xml b/compatibility_matrices/compatibility_matrix.8.xml
index 905778882a..d8115e158d 100644
--- a/compatibility_matrices/compatibility_matrix.8.xml
+++ b/compatibility_matrices/compatibility_matrix.8.xml
@@ -1,5 +1,5 @@
 <compatibility-matrix version="1.0" type="framework" level="8">
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio</name>
         <version>6.0</version>
         <version>7.0-1</version>
@@ -8,7 +8,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.audio.effect</name>
         <version>6.0</version>
         <version>7.0</version>
@@ -17,7 +17,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.audio.core</name>
         <version>1</version>
         <interface>
@@ -36,7 +36,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.audio.effect</name>
         <version>1</version>
         <interface>
@@ -44,7 +44,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.audio.sounddose</name>
         <version>1</version>
         <interface>
@@ -52,7 +52,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
          <name>android.hardware.authsecret</name>
          <version>1</version>
          <interface>
@@ -60,7 +60,7 @@
              <instance>default</instance>
          </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.audiocontrol</name>
         <version>2-3</version>
         <interface>
@@ -68,7 +68,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.can</name>
         <version>1</version>
         <interface>
@@ -76,7 +76,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.evs</name>
         <version>1-2</version>
         <interface>
@@ -84,7 +84,7 @@
             <regex-instance>[a-z]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.occupant_awareness</name>
         <version>1</version>
         <interface>
@@ -92,7 +92,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.vehicle</name>
         <version>1-2</version>
         <interface>
@@ -100,21 +100,21 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.remoteaccess</name>
         <interface>
             <name>IRemoteAccess</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.automotive.ivn</name>
         <interface>
             <name>IIvnAndroidDevice</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.biometrics.face</name>
         <version>3</version>
         <interface>
@@ -123,7 +123,7 @@
             <instance>virtual</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>3</version>
         <interface>
@@ -132,7 +132,7 @@
             <instance>virtual</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.bluetooth</name>
         <version>1.0-1</version>
         <interface>
@@ -140,14 +140,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.bluetooth</name>
         <interface>
             <name>IBluetoothHci</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.bluetooth.audio</name>
         <version>3</version>
         <interface>
@@ -155,21 +155,21 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.boot</name>
         <interface>
             <name>IBootControl</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.broadcastradio</name>
         <interface>
             <name>IBroadcastRadio</name>
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.camera.provider</name>
         <version>1-2</version>
         <interface>
@@ -177,14 +177,14 @@
             <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.cas</name>
         <interface>
             <name>IMediaCasService</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.confirmationui</name>
         <version>1</version>
         <interface>
@@ -192,7 +192,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.contexthub</name>
         <version>2</version>
         <interface>
@@ -200,7 +200,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.drm</name>
         <version>1</version>
         <interface>
@@ -208,14 +208,14 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.dumpstate</name>
         <interface>
             <name>IDumpstateDevice</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.gatekeeper</name>
         <version>1</version>
         <interface>
@@ -223,7 +223,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.gnss</name>
         <version>2-3</version>
         <interface>
@@ -231,7 +231,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.graphics.allocator</name>
         <version>1-2</version>
         <interface>
@@ -239,7 +239,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.graphics.composer3</name>
         <version>2</version>
         <interface>
@@ -248,7 +248,7 @@
         </interface>
     </hal>
     <!-- Either the native or the HIDL mapper HAL must exist on the device -->
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.1</version>
@@ -259,7 +259,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.health</name>
         <version>1-2</version>
         <interface>
@@ -267,7 +267,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.health.storage</name>
         <version>1</version>
         <interface>
@@ -275,7 +275,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.identity</name>
         <version>1-5</version>
         <interface>
@@ -283,14 +283,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.net.nlinterceptor</name>
         <interface>
             <name>IInterceptor</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.oemlock</name>
         <version>1</version>
         <interface>
@@ -298,7 +298,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.ir</name>
         <version>1</version>
         <interface>
@@ -306,7 +306,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.input.processor</name>
         <version>1</version>
         <interface>
@@ -314,7 +314,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.security.keymint</name>
         <version>1-3</version>
         <interface>
@@ -323,7 +323,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.security.keymint</name>
         <version>1-3</version>
         <interface>
@@ -333,7 +333,7 @@
             <instance>widevine</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.light</name>
         <version>2</version>
         <interface>
@@ -341,7 +341,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0-2</version>
         <interface>
@@ -351,7 +351,7 @@
             <regex-instance>vendor[0-9]*_software</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.c2</name>
         <version>1.0</version>
         <interface>
@@ -360,7 +360,7 @@
             <instance>software</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <version>1.0</version>
         <interface>
@@ -372,7 +372,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.memtrack</name>
         <version>1</version>
         <interface>
@@ -380,7 +380,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.neuralnetworks</name>
         <version>1-4</version>
         <interface>
@@ -388,14 +388,14 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.nfc</name>
         <interface>
             <name>INfc</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power</name>
         <version>4</version>
         <interface>
@@ -403,7 +403,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.power.stats</name>
         <version>2</version>
         <interface>
@@ -411,7 +411,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.config</name>
         <version>2</version>
         <interface>
@@ -419,7 +419,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.data</name>
         <version>2</version>
         <interface>
@@ -429,7 +429,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.messaging</name>
         <version>2</version>
         <interface>
@@ -439,7 +439,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.modem</name>
         <version>2</version>
         <interface>
@@ -449,7 +449,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.network</name>
         <version>2</version>
         <interface>
@@ -459,7 +459,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.sim</name>
         <version>2</version>
         <interface>
@@ -469,7 +469,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.sap</name>
         <version>1</version>
         <interface>
@@ -479,7 +479,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.voice</name>
         <version>2</version>
         <interface>
@@ -489,7 +489,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.ims</name>
         <version>1</version>
         <interface>
@@ -499,7 +499,7 @@
             <instance>slot3</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.radio.ims.media</name>
         <version>1</version>
         <interface>
@@ -507,7 +507,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.renderscript</name>
         <version>1.0</version>
         <interface>
@@ -515,7 +515,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.rebootescrow</name>
         <version>1</version>
         <interface>
@@ -523,7 +523,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.secure_element</name>
         <version>1</version>
         <interface>
@@ -532,7 +532,7 @@
             <regex-instance>SIM[1-9][0-9]*</regex-instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.security.secureclock</name>
         <version>1</version>
         <interface>
@@ -540,7 +540,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.security.sharedsecret</name>
         <version>1</version>
         <interface>
@@ -549,7 +549,7 @@
             <instance>strongbox</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.sensors</name>
         <version>2</version>
         <interface>
@@ -557,7 +557,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.soundtrigger</name>
         <version>2.3</version>
         <interface>
@@ -565,7 +565,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
          <name>android.hardware.soundtrigger3</name>
          <version>1</version>
          <interface>
@@ -573,7 +573,7 @@
              <instance>default</instance>
          </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.config</name>
         <version>1.0</version>
         <interface>
@@ -581,7 +581,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
+    <hal format="hidl">
         <name>android.hardware.tetheroffload.control</name>
         <version>1.1</version>
         <interface>
@@ -589,7 +589,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tetheroffload</name>
         <version>1</version>
         <interface>
@@ -597,7 +597,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.thermal</name>
         <version>1</version>
         <interface>
@@ -605,7 +605,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.hdmi.cec</name>
         <version>1</version>
         <interface>
@@ -613,7 +613,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.hdmi.earc</name>
         <version>1</version>
         <interface>
@@ -621,7 +621,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.hdmi.connection</name>
         <version>1</version>
         <interface>
@@ -629,7 +629,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.tuner</name>
         <version>1-2</version>
         <interface>
@@ -637,7 +637,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.tv.input</name>
         <version>1</version>
         <interface>
@@ -645,7 +645,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.usb</name>
         <version>1-2</version>
         <interface>
@@ -653,14 +653,14 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.usb.gadget</name>
         <interface>
             <name>IUsbGadget</name>
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -668,7 +668,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.vibrator</name>
         <version>1-2</version>
         <interface>
@@ -676,7 +676,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.weaver</name>
         <version>2</version>
         <interface>
@@ -684,7 +684,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.wifi</name>
         <version>1</version>
         <interface>
@@ -692,7 +692,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true" updatable-via-apex="true">
+    <hal format="aidl" updatable-via-apex="true">
         <name>android.hardware.uwb</name>
         <version>1</version>
         <interface>
@@ -700,7 +700,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.wifi.hostapd</name>
         <version>1</version>
         <interface>
@@ -708,7 +708,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="aidl" optional="true">
+    <hal format="aidl">
         <name>android.hardware.wifi.supplicant</name>
         <version>2</version>
         <interface>
@@ -717,7 +717,7 @@
         </interface>
     </hal>
     <!-- Either the native or the HIDL mapper HAL must exist on the device -->
-    <hal format="native" optional="true">
+    <hal format="native">
         <name>mapper</name>
         <version>5.0</version>
         <interface>