Merge "Adds AllSetActivity in Launcher." into sc-dev am: 19a1c4765f am: 0b391711d5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14419322

Change-Id: Ib06fd55c1d95b8326948abda317b9da5e3170477