Merge "Track transaction merges through transaction trace" into udc-dev am:...

Merge "Track transaction merges through transaction trace" into udc-dev am: addae5a2 am: 86e1289d am: 7d4d5d35 am: e34826de

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22688403



Change-Id: Ie34db744e5352f95a10f6d0e782701fab2152ef3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>