Add auto-enter-pip support in FallbackSwipeHandler

- Deprecate HomeAnimationFactory#supportSwipePipToHome and treat 3rd
  party Launcher supporting auto-enter-pip transition as well
- Add a new FallbackPipToHomeAnimationFactory if auto-enter-pip
  transition is to be launched
- Make sure Launcher is resumed at the end of auto-enter-pip transition
  to actually trigger the PiP task appearing

Video: http://recall/-/aaaaaabFQoRHlzixHdtY/hMPkRXy4vAjC6sQYUIIWUP
Bug: 220665901
Test: `m -j Launcher3` and verify the auto-enter-pip transition \
      see also the video
Change-Id: I6d16f2559d173f695ccbc743eb55e964bf088d04