Merge "Add WorkspaceRevealAnim, successor to StaggeredWorkspaceAnim." into sc-dev am: 7d4aaaa73d am: 3183befc61

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14523564

Change-Id: I129e5804fbd866b802930f9a7bd9b2ca49e657b9