Merge "AudioService: fix volumegroup mute sync" into tm-qpr-dev am: ac7514038f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21223480

Change-Id: Iad6bc0eed894e43826102b6d0311aa7f4dfce87f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>