Remove ShadeController from NSSL

Remove ShadeController from NotificationStackScrollLayout
and move it into the NotificationStackScrollLayoutController.

This removes the last call to Depedency.get from the
NSSL, (and its controller).

Bug: 147245740
Test: atest SystemUITests && manual
Change-Id: I2eeaee6273a2bec933126051a722ad0659bcec49
4 files changed