Merge "Allapps layout polishes" into sc-dev am: e67baf65f2 am: d733ce3f94

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

Change-Id: I9cc0ab3941eee7bf8284ffa241b1d11460f8a7a2