DSPManager: Boeffla sound 1.6.6

Change-Id: Id8c51fe643ece1ad77ecb01de31041fc0a860aa1
Merge "DSPManager: Boeffla sound 1.6.6" into android-4.4
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
Merge pull request #7 from omnirom/android-4.4

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