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

Change-Id: Ibe9c65f1fe024a859d98d96fd86199607a1060de
Base: Prevent lock/unlock sound during music playback

Lock/unlock sound mixes in with music and causes
lag and distortion.

Change-Id: Ide6c2cdd9b56379619ffc485d80f0106d23dec10