[automerger skipped] Add some tests for audio_util package am: a3b4a5f5 -s ours

am skip reason: Merged-In I991c908b45bec65dfd560f4eae22f776b8359116 with SHA-1 9b789892 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/20933365



Change-Id: I4abd2d40c721ac77fa931951e03da6d6c0178e1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>