Restores PiP to its original app bounds

Deprecated the usage of display bounds in PipTaskOrganizer, instead we
can save and restore the application bounds reported in taskAppeared.

Bug: 151050577
Test: repeatedly enter/exit PiP
Change-Id: If40431ff37e8dd5fa8b228d6085613da23701ea7
(cherry picked from commit 89f18ffad9fdefea59bde08e98e984491912bf78)
2 files changed