Audio gui additions

Audio GUI Updates

Added RecordAudioActivity.java to hold the audio GUI and for Vahe to attach the recording functions to.  Audio GUI is held in the layout file for this activity.

Two small changes to TraineeDetailFragment.java and MessageActivity.java that will allow the audio GUI to be reached so that a user can record their audio.

Vahe added the actual methods to record into the RecordAudioActivity.java.  Should be possible to record and play back audio, but not yet send it.