Merge "Add depth to -1 screen" into sc-v2-dev am: 6d80cafc68 am: 103d4536dd

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15405469

Change-Id: Ifbbf248af32fe0a94e2888197c67c698afd46385