Merge "Fix full widgets picker fast scroller height." into sc-dev am: 17385ce33e am: 9d308d0af0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14683794

Change-Id: I53dec94dd5f3c82556218f4001a60d1d082e0875