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

Merge "cameraservice: Add metrics for extension sessions" into udc-dev am: 42b66ccf am: 51e61d95 am: f00f69ea

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22979493



Change-Id: I9e9b0ef5ec3e9bbdb62da2760fc8cef82d881914
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>