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

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

Change-Id: I318268141c090fb0b714be18a94fb914eca6b604
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>