sailfish: update viewfinder media type
sailfish: update viewfinder media type

mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,foolab/cameraplus,alinelena/cameraplus,mlehtima/cameraplus,alinelena/cameraplus,mlehtima/cameraplus,foolab/cameraplus,mlehtima/cameraplus,alinelena/cameraplus,alinelena/cameraplus,mlehtima/cameraplus,foolab/cameraplus,foolab/cameraplus