Merge "Use WidgetSizes to estimate widget size instead of custom calculation" into sc-dev am: 4716ab3037

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14881309

Change-Id: Ib8aaaf71f69c669c42692ee11aecf6d73fa4cd1a