Merge "cameraservice: Add metrics for extension sessions" into udc-dev am: 6ed5a696

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/22984741



Change-Id: If7194030c8b080674bc1b9ccffc63962480f4e0d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>