Merge "Camera: Remove redundant RequestThread wait during flush" into tm-dev am: a62a9805

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/17650555



Change-Id: I80ebdb496e435e548dd926e86c668555ab4a0351
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>