g2: update audio inline with new audio blobs 4.4 LGE

* also updated mixer_path adjustments tuned by dr87

Signed-off-by: houst0nn <houstonn@gmail.com>
g2: Enable USB audio support

 * Use new QCOM USB audio path which uses the AFE proxy.
 * This fixes the issues with skips and drops when UI sounds play.

Signed-off-by: houst0nn <houstonn@gmail.com>
g2: Enable offload for USB audio

Signed-off-by: houst0nn <houstonn@gmail.com>