Merge "Don't change bucketing reason if app is already in better bucket." into...

Merge "Don't change bucketing reason if app is already in better bucket." into tm-dev am: 7950f77e am: a4225a22 am: d4a750e6 am: 7e7c789d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18496890



Change-Id: I5402773db4bb9326c9df07dd2a73a20f83b5a9c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>