Merge "Thread and Track: Update to audio_utils mutex" into udc-dev-plus-aosp am: a20e5fe1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24830953



Change-Id: I34b9bc43e3fb407872b826f630fd5d2433c4f4bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>