GitLab

- flac and vp8 using android default codec
- these codecs are supported
  (http://developer.android.com/guide/appendix/media-formats.html)
- use libstagefright_soft_flacenc.so as flac encoder
- use libstagefright_soft_vpxdec.so as vp8 decoder
- cleanup media_codec.xml

Change-Id: I64a16b3199085950a01523e80645eb348a4bd265