audio_effects.conf - Add loudness enhancer

This was added to the default audio_effects.conf in KitKat, but
the DSPManager override still doesn't have it.

Change-Id: I7dbc97fb76a188df385d2e73c769b7aade9baa82
DSPManager: also fix exception in normal use if boeffla module is not available

Change-Id: I782977c34b74fa5343a046a35ce9f266461e295c
DSPManager: one eyed king in the land of the blind

Hopefully now we replaved all places

Change-Id: Id7788165802aeca02e2407826f3d3cabe920187b
Merge remote-tracking branch 'omni/android-4.4' into omni