[automerger skipped] Merge "AudioFlinger: Add ThreadBase and PlaybackThread...

[automerger skipped] Merge "AudioFlinger: Add ThreadBase and PlaybackThread interfaces" into udc-dev-plus-aosp am: 781fdf36 am: a5bea7bf -s ours am: d8f1b13d -s ours

am skip reason: Merged-In Ied45a5d762b5a53c9d5dcd88d26efaa8b058836d with SHA-1 3e4c8749 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24473111



Change-Id: I88ee4727ba7a92b10b816eff153b43c7ddabb76a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>