Merge "audiorecord_tests: Fix remaining threading issues" into main am: 21675facc8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3157538

Change-Id: If46cb9d53e2975799e7218401cde9263e04e4204
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>