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

Merge changes from topic "modernize mediasyncevent" am: 12a7ed2f am: 52d6f0e9 am: 3e17f76b am: 8d62670e am: b083af37 am: 303cd294

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



Change-Id: Id1cc701c2af2749718e4e7bcdd40c38e07a01eb5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>