Start/stop foreground service delegate for musicfx app. am: 05536405 am: 3ee3a566

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2787259



Change-Id: If43c86e7b673412583059c3164903376adceabad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>