Expand NotificationsModule

This CL is the 1st in the series of CLs which intend to "unbind" StatusBar on TV.
In order to make StatusBar really optional and thus to allow us to unbind it, we also need to make some of the classes that depends on it optional as well. For all these cases we need to move from @Inject-annotated contructors to @Provides annotated methods. For this we are expanding NotificationsModule.

Change-Id: Icccafd2170f2fdffb8412370056aab7042ffd580
Test: make SystemUI; make CarSystemUI; atest SystemUITests
Bug: 146188087