[Ongoing Call Chip] Add a click handler using ActivityLaunchAnimator.

Demo video: https://b.corp.google.com/issues/183229367#comment8

Thanks to jdemeulenaere@'s hard work on animations, this is an easy
change on my end.

Test: atest and manual
Bug: 183229367
Change-Id: I9411bf6fc11b380717ac139ef57f1c67011cac61