It's probably simpler not to have registers dance around,
and just message the feedback manager when the audio event
happens.
Change-Id: Id0710ed102d10d01f1af93ad8cb660653bb3a9f8
There is little point in deferring loading for this. Getting the
service at startup time is not very expensive anyway, plus we
can avoid getting it in a later change if sound is off in settings.
Change-Id: I08d65467f245fa2f9f617eb23257c327b3115673