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

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

Change-Id: Ifb060343fe99a015b4f0dc475a38391a92a042ee