libmix: fix video corruption in WiDi ext mode

BZ: 11037

fix video corruption in WiDi ext mode by getting skip frameflag
and set reference frame correctly

Change-Id: Iad0610606573e2614a986a0e2b44ce70e6a673a4
Signed-off-by: Weian Chen <weian.chen@intel.com>
Reviewed-on: http://android.intel.com:8080/20215
Reviewed-by: Tao, Tao Q <tao.q.tao@intel.com>
Reviewed-by: Marotte, Fabien <fabien.marotte@intel.com>
Tested-by: Sun, Hang L <hang.l.sun@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
1 file changed