Use last user-resized size when re-entering PIP

Bug: 160799929
Test: enter PIP, resize it, restore to fullscreen then re-enter.
The re-entry size should be the same as when exiting.

Change-Id: Idb36b5ec51c2d76b9df5f311518652109fa57b37
Merged-In: Idb36b5ec51c2d76b9df5f311518652109fa57b37
(cherry picked from commit 134e7fc4138a479349d95efd4d68177d7b483540)
3 files changed