Merge "Remove RefBase from the extractor API"

cmds/stagefright/SineSource.cpp

cmds/stagefright/recordvideo.cpp

cmds/stagefright/stagefright.cpp

include/media/MediaSourceBase.h

include/media/MediaTrack.h

include/media/VorbisComment.h

media/extractors/aac/AACExtractor.cpp

media/extractors/aac/AACExtractor.h

media/extractors/amr/AMRExtractor.cpp

media/extractors/amr/AMRExtractor.h

media/extractors/amr/Android.bp

media/extractors/flac/Android.bp

media/extractors/flac/FLACExtractor.cpp

media/extractors/flac/FLACExtractor.h

media/extractors/midi/Android.bp

media/extractors/midi/MidiExtractor.cpp

media/extractors/midi/MidiExtractor.h

media/extractors/mkv/MatroskaExtractor.cpp

media/extractors/mkv/MatroskaExtractor.h

media/extractors/mp3/MP3Extractor.cpp