Changelog:

add support for flac decoder
add support for DTS decoder
remove unused code
add support for ape decoder
add setRAFormat fxn for RealAudio configure
add support for real-video(RMVB)
add support for vc1 video decoder
set wma and wmv format to distinguish WMV1, WMV2, WMV3, WMAV1, WMAV2...
add kKeyRawCodecSpecificData in meta
add support for wmav2(audio codec)
add support for wmv1 and wmv2
add support for ac3(stereo) audio decoder
fix OMX.ffmpeg.mp1.decoder and OMX.ffmpeg.mp2.decoder name
add support for MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_I and MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II
fix audio decoder role name
add support for OMX.ffmpeg.mp3.decoder
add support for OMX.ffmpeg.aac.decoder
fixes the stagefright Plugin interfaces to add ExtendedExtractor and ffmpeg decoder

Personally tested only FLAC... Others may/may not work.

Credits:
https://github.com/omxcodec/android_frameworks_base/commits/cm-9.1.0

Change-Id: I5283488a02058cde481ebcd59dfaa2ee4aa62fce