Merge "Remove callback upon MediaSession#release" into udc-qpr-dev am: 80b79f2e am: 7f6e145b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24337241



Change-Id: If8901bc24ca7a5d03e1184b3400c9d39969c251d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>