Add live tile overlay only once across multiple LauncherSwipeHandler

- Use singleton on LiveTileOverlay to make sure we only have one LiveTileOverlay instance
- Clean up upon recents animation cancelation

Fixes: 140337263
Test: diligently swipe up and down
Change-Id: I8e0db3c5240135a6deb4f4d91493b8eede7c5ff1