Fixed an issue where the roundness of a notification could be wrong

When animating away a heads-up, there was no listener in place and
if the view in question wasn't the first notification, it's
roundness could be wrong.

Change-Id: I0676ee18c9fb0c52b190b82b8b9adfa63d584262
Fixes: 76147670
Test: runtest systemUI
7 files changed