Merge "Save multiple RunningTaskInfo in GestureState" into sc-v2-dev am: 20102c3dd7 am: a51f394504

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16482597

Change-Id: If69bd5e02de59bdfe05a8f7fcc03a4ff235d4c41