Merge "Launcher changes for go/widget-size-specification" into sc-dev am: 4fb5d4d3ca

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13473552

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I946921dfca5b70656c05cc1cbcc9d813e39364be