Merge "Allapps layout polishes" into sc-dev am: e67baf65f2 am: 3f28283be1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15190139

Change-Id: I9ad19221e63dee290ec51b9ade90ccc7024a5236