Merge changes from topic "ccassidy-sbwsc"

* changes:
  [Status Bar Refactor] Have SBHideIconsForBouncerManager listen to window state directly instead of getting it from StatusBar.java
  [Status Bar Refactor] Have NotificationShadeWindowViewController query the window state directly instead of going through StatusBar.java.
  [Status Bar Refactor] Move status bar window state tracking into a centralized class and add some listeners for it.
  [Status Bar Refactor] Pass status bar view's controller to NotificationShadeWindowViewController instead of the view itself.