[automerger skipped] Effect AIDL: remove unnecessary mutex in Reverb am: a0c0a4fb -s ours

am skip reason: Merged-In I62c2741656fd135f50829188f569bd3884e89bcb with SHA-1 cda232d7 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/26566015



Change-Id: I81a1244b676414e19ceecbdaa8b4676894683637
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>