test: add color conversion test option in putsurface

- command line:  ./putsurface --fmt1 format1 --fmt2 format2
              or ./putsurface -1 format1 -2 format2
- example:       ./putsurface -1 NV12 -2 YV12
- implementation:
  - vaSurface is created with fmt1
  - get image (with fmt2) from vaSurface,
    it leads to color conversion
  - put the above image to a temp surface
    color conversion may happen
  - render the above temp surface instead of original one
tests: cope with new vaQuerySurfaceAttributes() API.

Also factor the code to check whether a specific image format or
surface attribute exists. Cache the list of supported image formats
and surface attributes.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>