Revert "Prevent recents from closing while moving PiP to fullscreen."

This reverts commit 744e6e3aef4d4b6cb3a75e8ecbbc1796da2388b2
to prevent Recents from shown again after an activity is PIPed
immediately after the fullscreen.

Bug: 28333917
Change-Id: Ifeceb910eefc3eef109bdc3ed24e11109f2cf9b4
2 files changed