Merge changes from topic "modernize mediasyncevent" am: 12a7ed2f am:...

Merge changes from topic "modernize mediasyncevent" am: 12a7ed2f am: 52d6f0e9 am: 3e17f76b am: 8d62670e

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2599665



Change-Id: Ia1fba2649f16b9f387a50bee44bd9f868eb80c8e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>