Merge "NotificationPlayer: use AUDIOFOCUS_GAIN_TRANSIENT instead of AUDIOFOCUS_GAIN in looping mode" am: 1622d409d9 am: 551484f392 am: 81bcc784eb am: dbbd56e1df

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2138096

Change-Id: If7ea36dd55da4356508ccc045bde703df88bf963
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>