Add AudioAttributes and AudioFlag for use in HAL interface for engine configuration. am: dd2b7eb564 am: 22ca577fe8

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/19874524

Change-Id: I5a491aefded9c7dd4ca8f56e4b189d7b45206911
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>