Audio: Tunnel Exception for ER AAC ELD profile format

- some m4a clips are not working properly

- ADSP audio decoders don't support ER AAC ELD support

- Added tunnel exception for ER AAC ELD format.
  Added AACProfile metadata support for MKVExtractor

Change-Id: I2f6fe721b05377dfe0f24ea0ad1f6c4a885d576d
audio: Check the return code of MediaWriter::start

- Return code of MediaWriter::start method is not checked
  in startRawAudioRecording. Due to this, sound recorder
  application is not receiving the error whenever there is
  an error in starting of the recording
- Fix is to check the error and return it back to
  the client accordingly

Change-Id: I15916211da7a2eb0f27fbf9d4151410a8bdfdd42
CRs-Fixed: 591788