legacy/msm8660: fix VoIP in call audio transmission

 Forward port fix from CM10.2

 - In VoIp call mute option is not working
 - Due to wrong device selection, PCM recording path is selected, instead
   of MVS Tx path, for VoIP tx.
 - Enable MVS Tx path for VoIP uplink.
 - Add verification for available input device
 - Updated audio policy to add IN_COMMUNICATION global config

Change-Id: Idf00768e56bd872a1cc82c6aa05448421dd3f246