Merge "cameraservice: Log session index" into udc-dev am: 8313fab9 am: 2a1ba122

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23001482



Change-Id: I500228e165d320ad918feb7ce8b974d1b2a88038
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>