Doze: Update tease signal to buzz-beep-blink from NoMan.

Inform SystemUI when NoMan buzzes, beeps or blinks.  Use that
as the notification signal when dozing instead of trying to figure
out interesting panel content updates.

At some point, we should move the entire calculation up into SystemUI
itself, but that's too large of a refactoring to perform now.

Bug:15863249
Change-Id: I40e92334977e0676a1363774c2cbbf91d72ec8e5