Add input device AUDIO_DEVICE_IN_BACK_MIC
Increase audio quality of 1080p to 196kbps stereo

Change-Id: I8be36fa6ed91d8328629356e67b16d5c09ff806a
smdk4412: media: revert channels to 1 for 1080p recording

Change-Id: I2f39eeac73f8b2bb2ec20febd7bf8e99f29982eb