Merge "audio: make sure to set back to AudioMode::NORMAL after the test case" into sc-dev am: 183f6190a8

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15310729

Change-Id: Idcad11a2b0004eccf26aeab48b8190d6aa7fe86b