compat matrix: add ISap slot2

The framework supports this, but devices copied its support
into each of their compat matrices instead of adding it once
here.

Bug: 290408770
Test: build
Change-Id: I2de4f1365a6981a0a2ef7165c916fba91a340799

compatibility_matrices/compatibility_matrix.4.xml

@@ -361,6 +361,7 @@
         <interface>
             <name>ISap</name>
             <instance>slot1</instance>
+            <instance>slot2</instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">

compatibility_matrices/compatibility_matrix.5.xml

@@ -399,6 +399,7 @@
         <interface>
             <name>ISap</name>
             <instance>slot1</instance>
+            <instance>slot2</instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">

compatibility_matrices/compatibility_matrix.6.xml

@@ -454,6 +454,7 @@
         <interface>
             <name>ISap</name>
             <instance>slot1</instance>
+            <instance>slot2</instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">

compatibility_matrices/compatibility_matrix.7.xml

@@ -582,6 +582,7 @@
         <interface>
             <name>ISap</name>
             <instance>slot1</instance>
+            <instance>slot2</instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">