Packager should not care about this flag, whether it is supported is up to the decoder. Closes #126 Change-Id: I5e05d291eab01375f7f11c951b9dc93c1358c38a
Also move codecs related classes in mp4 to codecs directory. Change-Id: I83db2bcf9e66b405fcceed78918b762b26cd7fce