* Removed some dead code from NotificationTopLineView
* Icons appear left-aligned, as they do with conversations
* Fixed the order (also with conversations) to ensure that
the 'alerted' icon disappearing doesn't cause movement
(at least when the header text fits; otherwise some
amount of movement is unavoidable).
Bug: 163626038
Test: manual
Change-Id: I8e19dd504f8c861f752cd2705048f015ab0e3106
87257cbb6e