[Base] Refactor hw keys handling with navbar presence (1/2)

- this commit removes per hw keys disabler/enabler. Now all hw keys get their functionality observing navbar state. Navbar on = all hw keys disabled and navbar off = all hw keys enabled. Add a check in ViewConfiguration.java to determine presence of navbar for add or remove 3-dots menu button in app that need this.

Change-Id: I6f4fb6c0f3cad20be3b3ce171dc7021a43884f36