Loosen the user id check for master mute on automotive

For automotive,
- the car service is always running as system user
- foreground users are non-system users

Car service is in charge of dispatching the key event include master
mute to Android. Therefore, the getCurrentUser() is always different to
the foreground user.

See also go/aae-multi-user

Bug: 113268803
Test: adb shell input keyevent 164
Change-Id: I65d4a4bc1b96eec7dc61ed04c5acc425f37a9061
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index 507f398..7f2ef07 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -2628,7 +2628,13 @@
             // The isPlatformAutomotive check is added for safety but may not be necessary.
             return;
         }
-        if (getCurrentUserId() == userId) {
+        // For automotive,
+        // - the car service is always running as system user
+        // - foreground users are non-system users
+        // Car service is in charge of dispatching the key event include master mute to Android.
+        // Therefore, the getCurrentUser() is always different to the foreground user.
+        if ((isPlatformAutomotive() && userId == UserHandle.USER_SYSTEM)
+                || (getCurrentUserId() == userId)) {
             if (mute != AudioSystem.getMasterMute()) {
                 setSystemAudioMute(mute);
                 AudioSystem.setMasterMute(mute);