Allow permission controller to read audio configuration

- Unfortunately there is no read-only permission that allows to read the
audio configuration
- Unfortunately there is no API bump before the feature ships that would
allow us to add such a read-only permission

Bug: 162547999
Test: Read audio configuration from permission controller
Change-Id: Icfe2b5ae54cae1cfc1be44a1370ffb0692365316
diff --git a/data/etc/privapp-permissions-platform.xml b/data/etc/privapp-permissions-platform.xml
index 880c6f9..4325ef4 100644
--- a/data/etc/privapp-permissions-platform.xml
+++ b/data/etc/privapp-permissions-platform.xml
@@ -143,6 +143,7 @@
         <permission name="android.permission.SUBSTITUTE_NOTIFICATION_APP_NAME" />
         <permission name="android.permission.PACKAGE_USAGE_STATS" />
         <permission name="android.permission.CHANGE_COMPONENT_ENABLED_STATE" />
+        <permission name="android.permission.MODIFY_AUDIO_ROUTING" />
 
         <!-- For permission hub 2 debugging only -->
         <permission name="android.permission.GET_ACCOUNTS_PRIVILEGED"/>