Do not pass the volume key event to remote sessions

Bug: 194245558
Test: manually
Change-Id: Ic620d0efffdd18242c99eae40fa289bbdfd1b31a

services/core/java/com/android/server/media/MediaSessionStack.java

@@ -325,7 +325,8 @@ class MediaSessionStack {
         int size = records.size();
         for (int i = 0; i < size; i++) {
             MediaSessionRecord record = records.get(i);
-            if (record.checkPlaybackActiveState(true)) {
+            // Do not send the volume key events to remote sessions.
+            if (record.checkPlaybackActiveState(true) && record.isPlaybackTypeLocal()) {
                 mCachedVolumeDefault = record;
                 return record;
             }