Merge "Update when PlaybackState state or actions change" into tm-dev am: 80017b1f am: 3748092a am: 7a0e7280

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18014216



Change-Id: If8fd9ed24a11bd73015de3d5453419dcf9702da3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>