Merge "Start script to finalize branch release." am: 7a396db0 am: 969dd0f4...

Merge "Start script to finalize branch release." am: 7a396db0 am: 969dd0f4 am: 767a7d9c am: db20a629

Original change: https://android-review.googlesource.com/c/platform/build/+/2066080



Change-Id: If0e90c8b390919e4caa7f9fc9a52ca36707977f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>