Merge "Stabilize audio playback types used by the HAL" am: c32724f212

Original change: https://android-review.googlesource.com/c/platform/system/hardware/interfaces/+/2364106

Change-Id: I8e3aea7bf2120c704b421bce864d39d40ef97544
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>