Merge "media: release mediaplayerservice lock while dumping services" into tm-dev am: 1bb520ee

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/18444545



Change-Id: I754186df48dec59aff6ce5826cee050617edcbb4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>