Merge "Pause the AllSetActivity background animation more reliably." into tm-qpr-dev am: 2b3bd3039b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19239008

Change-Id: I14edb00abbe20a8c20deecad34ea12c0ce20f2f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>