Add a persist.wm.debug property type and associated permissions

This is intended for wm properties related to wmshell/sysui.
Using this context allows sysui to manipulate these properties
in debug builds.

Bug: 219067621
Test: manual
Change-Id: I5808bf92dbba37e9e6da5559f8e0a5fdac016bf3

private/app.te

@@ -14,6 +14,7 @@ get_prop(appdomain, userspace_reboot_config_prop)
 get_prop(appdomain, vold_config_prop)
 get_prop(appdomain, adbd_config_prop)
 get_prop(appdomain, dck_prop)
+get_prop(appdomain, persist_wm_debug_prop)
 
 # Allow ART to be configurable via device_config properties
 # (ART "runs" inside the app process)

private/compat/32.0/32.0.ignore.cil

@@ -50,6 +50,7 @@
     locale_service
     mdns_service
     nearby_service
+    persist_wm_debug_prop
     proc_watermark_boost_factor
     proc_watermark_scale_factor
     remotelyprovisionedkeypool_service

private/platform_app.te

@@ -40,6 +40,10 @@ allow platform_app sdcard_type:file create_file_perms;
 # com.android.systemui
 allow platform_app rootfs:dir getattr;
 get_prop(platform_app, radio_cdma_ecm_prop)
+userdebug_or_eng(`
+  set_prop(platform_app, persist_wm_debug_prop)
+')
+neverallow { domain -init -dumpstate userdebug_or_eng(`-domain') } persist_wm_debug_prop:property_service set;
 
 # com.android.captiveportallogin reads /proc/vmstat
 allow platform_app {

private/property_contexts

@@ -102,6 +102,7 @@ test.userspace_reboot.requested u:object_r:userspace_reboot_test_prop:s0
 sys.lmk.                u:object_r:system_lmk_prop:s0
 sys.trace.              u:object_r:system_trace_prop:s0
 wrap.                   u:object_r:zygote_wrap_prop:s0 prefix string
+persist.wm.debug.       u:object_r:persist_wm_debug_prop:s0
 
 # Suspend service properties
 suspend.max_sleep_time_millis u:object_r:suspend_prop:s0 exact uint

private/shell.te

@@ -227,3 +227,6 @@ allow shell apex_info_file:file r_file_perms;
 # Let the shell user call virtualizationservice (and
 # virtualizationservice call back to shell) for debugging.
 virtualizationservice_use(shell)
+
+# Allow shell to set persist.wm.debug properties
+userdebug_or_eng(`set_prop(shell, persist_wm_debug_prop)')

private/system_server.te

@@ -799,6 +799,9 @@ get_prop(system_server, net_464xlat_fromvendor_prop)
 # Read hypervisor capabilities ro.boot.hypervisor.*
 get_prop(system_server, hypervisor_prop)
 
+# Read persist.wm.debug. properties
+get_prop(system_server, persist_wm_debug_prop)
+
 # Create a socket for connections from debuggerd.
 allow system_server system_ndebug_socket:sock_file create_file_perms;
 

public/property.te

@@ -74,6 +74,7 @@ system_restricted_prop(init_service_status_prop)
 system_restricted_prop(libc_debug_prop)
 system_restricted_prop(module_sdkextensions_prop)
 system_restricted_prop(nnapi_ext_deny_product_prop)
+system_restricted_prop(persist_wm_debug_prop)
 system_restricted_prop(power_debug_prop)
 system_restricted_prop(property_service_version_prop)
 system_restricted_prop(provisioned_prop)