Merge "launcher: correct the amount of padding for preview" into sc-v2-dev am: f952fd9256 am: 9f76d9d09a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15547452

Change-Id: I1dd9dd360249bdc6545e53498e632a5bad977586