Merge "cameraservice: Log session index" into udc-dev am: aa415dc2 am:...

Merge "cameraservice: Log session index" into udc-dev am: aa415dc2 am: f1413690 am: 33c6a21e am: 4152e5e8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/22984740



Change-Id: Iebffac3a24d422db087c6d37f836c1b3efd19640
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>