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: Ibcfc54eb591d013923b37e84e47a30a90e187e34
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>