Merge "AudioFlinger: Refactor SyncEvent" am: b87f4cadbf am: eb60033ad1

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2599067

Change-Id: I7f34f7f43340ff926b4f1e11faed6f63e025e283
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>