Add more sample rates

 * We can handle these higher samplerates.

Change-Id: I5c54aafb8a3471c1ab80661a39cec94e7f5d934c
Beef up the test cases for different formats

 * Allow WAV files, more sample rates, and more channel masks in the
   OpenSLES test player.

Change-Id: I6a5b582f41c229b07f44da9dcaee6f997acb6650