Fixed a bug where a removed notification would stick around

Because we going back to the keyguard, the translation was
reset and the callback would not be called, leaving us with
a stuck notification.

Test: have only 1 notification in shade locked an swipe it away after doing a half-swipe first
Change-Id: Iea2db4ff7efa2e84aa36cd13cfa8cfa1859d6892
Fixes: 64762751