Adjust workspace grid and cellLayout paddings. am: 08610ca583

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17586931

Change-Id: I549a28d042b0086b321a8af61665851c81303c05
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>