audio: audio enhancement for playback and capture.

- Add playback and record support for EVRC, QCELP,
  WMA, AMRWBPLUS, WAV, AC3, and EC3.
- Add support for 5.1 channel recording.
- Add constants for call_state and vsid.
- Add definition for FM and proxy audio devices.

Change-Id: Ib6bba322d4c3bd920be4cb2ef52891de8b1ab568
Conflicts:
media/java/android/media/AudioRecord.java
media/java/android/media/AudioSystem.java
media/java/android/media/MediaRecorder.java
Conflicts:
media/java/android/media/AudioSystem.java

Conflicts:
	media/java/android/media/MediaFile.java