Merge "Camera: Quit extension handler thread during release" into udc-dev am: f34e90c0 am: f82c0efe am: 9909fddf

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



Change-Id: I2174400aa53479b008ecacb4452b62ed81fbe512
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>