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: d4488993

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



Change-Id: I6b376d0e6ca5fa76056e0cd27f150d98c2d3681f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>