Merge "Camera: Quit extension handler thread during release" into udc-dev am: f34e90c0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23064806



Change-Id: I8d2fda34dea92058da8abeb326239aff5647b748
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>