Fixed the aspect ratio in PictureInPictureAutoEnter

Since the actual aspect ratio is defined in layout file, measuring the
value in layout change listener can only cause irrelevant
onTaskInfoChanged callbacks sent to SysUI due to 1px difference.

Bug: 180630127
Test: enter PiP w/ autoEnter from landscape in button navigation
Change-Id: I25dcf82bfbebde017c2c938d745c23d615a7015b
1 file changed