Merge "Maintain TaskView's scroll invariant when swiping down" into sc-dev am: c9744631f4 am: 8e0022c532 am: ab83035246

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14425536

Change-Id: I87d1d4988c06e33cb3da68c9c5e0e4bccd22f7b2