Remove dependency from RemoteInputController to StatusBarWindowManager.

Removes the direct dependecy from RemoteInputController to
StatusBarWindowManager and adds a test testing that notification
management code doesn't depend upon StatusBarWindowManager.

Bug: 63874929
Bug: 62602530
Test: runtest systemui
Test: Compile and run
Change-Id: I9cf63a7069cd6c4b7bd05db881c3029fe5bb1fad
4 files changed