stagefright: Improve 24-bit support

 * Cleanup and fixes to allow FFMPEG codecs to output raw 24-bit PCM

Change-Id: Ideeb7cd7c6340f8054f99272796032939b561f81
camera: add new option to include camera parameters

All info can be seen here: http://forum.xda-developers.com/android/help/dev-mod-to-add-extra-camera-parameters-t2814578

Change-Id: I6eb8d43b5e73058f671f4a9129d8353e0f3c7d04