Correct Launcher3 for new sizes in App Widgets.

This follow recommendations from the API council review.

Also removes two public functions introduced recently by
http://ag/13473552 and are not needed anymore.

Bug: 181611658
Test: Manual testing with local widget.
Change-Id: I8d0c90a80a0d45981bd5d16e69cd86639d5ec7d8
5 files changed