New tap on PiP window behavior

PiP window stays same on tap if it's large enough to hold all the
actions within it. Ignore the artifacts in demo video such as the shift
of settings button and menu resize out of sync, they are tracked in
separate bugs.

Video: http://rcll/aaaaaabFQoRHlzixHdtY/hkQgdmbuBhNT0WdKW8aegL
Bug: 175055101
Test: See video
Change-Id: Ie19b30dd1e8ba716095b76a3f341b5ab2a51399b