Merge "Update mStandby flag in RecordThread" into main am: 20e74209e8 am: a1c199d1d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3367822

Change-Id: I1a06963b698f889c873c318db9c72945040fcb9d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>