Merge "Draw the workspace scrim in the LauncherRootView instead of DragLayer" into sc-dev am: 12e547f2a8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13463974

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ife11e4b17a1287979ee5612ec651654c405311eb