Revert "[Pip2] Add a new interface method to IPipAnimationListener"

This reverts commit 5eadb359598fc3f60930084a2b542ced8e091898.

Reason for revert: We no longer want to reload Recents when dismissing PiP.

Change-Id: I14cebd2a7c113761575546c896a1bb82f7bf5dea
4 files changed