stagefright: Move to 64 available tracks

Many games use numerous tracks.  If the system
runs out of tracks, new tracks won't be able
to be created.  This has been causing notifications
not to play if many apps are holding open tracks.

Issue: BACON-6

Change-Id: I9cea51b9bd678feba31a88e17dd22083b01d81de
Merge "stagefright: Move to 64 available tracks" into cm-11.0
stagefright: Fix 24-bit WAV

 * When 24-bit output is enabled, we need to ensure that padding
   to 32 bits is done correctly.
 * Create new output buffers which conform to the correct format.

Change-Id: I5c07027ee8d3040147698c1f484b40991f943c03
Merge remote-tracking branch 'CM/cm-11.0' into cm-11.0