Adjust workspace grid and cellLayout paddings. am: 08610ca583 am: 7cb2e47e87

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

Change-Id: Idb8149ad5ea8d9753256e64a6040656aca4ce4f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>