Merge "Consolidate isTablet logic across Launcher and SysUI" into sc-v2-dev am: cc1e94a982

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15898421

Change-Id: I0634c4df4d7ccad9862f934c5fa2e09922c51209