The video decoder and mirsink now both work with playbin, although mirsink must be explicitly set with playbin's video-sink property to be used. Playbin can't yet automatically select mirsink from a list of possible sinks that it could use.
Some build fixes

  - Path qualify hybris includes
  - Use the CFLAGS and LDFLAGS in androidmedia since we need to use
    headers elsewhere in this project.
Fix some more include paths
Various additional build / linking fixes