[1/3] base: allow disabling non intrusive incall ui

Change-Id: Ibe9c65f1fe024a859d98d96fd86199607a1060de
Quiet Hours Ringer (2/3)

Change-Id: Id58ffb24f0d0d57d8446265c899ec4124fe00c70
Merge "Quiet Hours Ringer (2/3)" into kitkat