Merge "Explicitly set mAllowGoingDown = false when only up is allowed" into sc-dev am: 2b93dbb0b8 am: 6b5c7da9d5 am: 4fcb2892d1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14444776

Change-Id: I790490bfeaf074925acc49678e5b56c17e7fd336