audio: fix unresolved link error for javadoc

- Remove @link comments for extended audio
  formats to fix unresolved link error while
  compiling Javadoc
- These extended audio formats are not standard
  AOSP definition and should not be updated for
  javadoc

Change-Id: I34fec0d9709a7def0f92660b6ec0a8e971529161
Merge "audio: fix unresolved link error for javadoc" into lollipop