video: support for VUYA format
AYUV in gstreamer was defined in A-Y-U-V order in memory[1], however Microsoft defined another AYUV format in V-U-Y-A order in memory[2]. Add VUYA format for the latter in order to distinguish the two formats and support VUYA in glimagesink as well
[1] https://gstreamer.freedesktop.org/documentation/design/mediatype-video-raw.html#formats
Edited by Haihao Xiang