Do not run hint animation during aod=>ls transition

Also add additional tests for when hint animation should run.

Fixes: 228420035
Test: NotificationPanelViewControllerTest
Test: tap empty space on lockscreen during aod=ls transition
	=> notification unfurl completes with no hint animation
      tap again after unfurl has completed
	=> hint animation runs fine

Change-Id: I1e34d17f692a88b708b0233f02229acbb5270fae