Merge "Removing GridMigrationTask-v1 since it has been disabled for a while" into sc-v2-dev am: b2f8f42510 am: fa01653b83

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15404308

Change-Id: Idd8e1bb0ca99a2b3d26372c1559c4a0ee5253a24