Merge "Fix full widgets picker fast scroller height." into sc-dev am: 17385ce33e am: 99623596ac

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

Change-Id: I9ca3c51ad60c4e96cc95c870c8310dc0d2e20b19