NotificationShelf ViewBinder + WrapperController

This new implementation is a fork of the existing implementation, but
converted to Kotlin. It is functionally identical, but sets the stage
for a transition to a ViewBinder as a replacement for the
NotificationShelfController.

Bug: 271161129
Test: atest SystemUITests
Change-Id: Ica1acf70e001353b1b24d3d53c6de02ad217079d