[Status Bar Refactor] Remove final StatusBar references from

PhoneStatusBarView.

The references are moved into NotificationPanelViewController, which
admittedly isn't *that* much better of a location but it's better for it
to be in a controller instead of a view, and NPVC already has 40+
references to StatusBar.

Fixes: 199733640
Test: manual (verified StatusBar's callback still triggers)
Test: atest SystemUITests
Change-Id: I05a4f0ed52c02f0caff621f64d188189cceb48d0