Merge "Camera: Use a single handler thread for device state callbacks" into...

Merge "Camera: Use a single handler thread for device state callbacks" into udc-dev am: 5f614202 am: 4f28214a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21563739



Change-Id: Ib88257c6a8ffd80e6f658acff7a6bc50ecd31e70
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>