[automerger skipped] aaudio: lock transport methods am: 10710e4687 am: fa24d44e43 -s ours

am skip reason: Change-Id I5920cf78af4501856756c5c2fc8e77758232508a with SHA-1 7ebbc11051 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11491867

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iac1383dd4b076e234bcf027fa5def63d35d269a4