Merge "Use the LayoutManager as the source of truth for visible positions" into sc-dev am: 5cc44eb73e am: 3256647b03

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14800536

Change-Id: Ib18ac4b3d92e569156093372c5e32c25be50df82