Cleanup
1.audio: add device specific audio_effects.conf file
Audio preprocessors are no longer included in the default
audio_effects.conf as of 4.2, so add an audio_effects.conf exposing the
effects that are supported by aries.
2.Camera looks overexposed, so tweak down the exposure compensation
@juansheng

Change-Id: I27e7eaee7986f14d0cac6c23f78d480aff6e59b9