i9305: audio hal mic updates

Fix for audio mic distortion during video recordings.

Set adev->in_device = AUDIO_DEVICE_NONE at call completion

Change-Id: I2b2596adf694d42826846b92664ce31d69512f58
i9305: slight speakerphone volume boost

Change-Id: Ibff955cc00a66c122ad4fa2590f6eed757cc3ad1
camera overlay fix

Change-Id: I46e8948280975cb4671be93d507c437ffc13e254