ffmpeg-qsv: add mfx runtime check test

Signed-off-by: U. Artie Eoff <[email protected]>

gst-msdk/gst-vaapi:add a format VUYA.

   We need format "VUYA" to encode and decode some 8bit 444
   video stream,so I add it.

Signed-off-by: Yuankun Zhang <[email protected]>