Merge "mediaserver: add more hwbinder threads" into rvc-dev am: 2038329c am:...

Merge "mediaserver: add more hwbinder threads" into rvc-dev am: 2038329c am: 4bc9b54a am: 8d912404 am: b0b4d169

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/12046706

Change-Id: I3efee608a7100b073198f057e924d7ddd5313374