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

Change-Id: I8be36fa6ed91d8328629356e67b16d5c09ff806a
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_device_samsung_smdk4412-common into cm-10.1