Preserve the bounds upon double-tap PiP

Add the missing call to indicated user resized PiP upon double-tap.

Flag: EXEMPT bugfix
Video: http://recall/-/aaaaaabFQoRHlzixHdtY/hEnoCnNHGD7i6vRKCYgzVj
Bug: 394001686
Test: Double-tap PiP window while IME is present, then dismiss IME
Change-Id: Ic23ddeac874806669305afda930d63a0b4be5ee7