Merge "Moving widget background to xml, so that the same constantstate is used for all entries" into tm-qpr-dev am: a75105ef03

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21381944

Change-Id: Icb8819fae2b4fd21f76faea78e3e341a32a9508f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>