Merge "Return aaudio_result_t for validating channel mask." into udc-dev am:...

Merge "Return aaudio_result_t for validating channel mask." into udc-dev am: 63ea3704 am: 8ef990c8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/21522124



Change-Id: Id05f53aac346871a7fd1213224484b79571c621d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>