Merge "Fix ClassCastException in QuickstepModelDelegate" into sc-v2-dev am: 32ebd9f94f am: cfa85344b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16307859

Change-Id: Iae1d568de658269b2abe7a7a52ba7225fb693f30