add (Vulkan) blacklisting to Skia

Currently there's nothing blacklisted, but this is the code.
And there's not much point in blacklisting CPU-based raster Skia,
so check only for Vulkan.
Since this requires accessing Vulkan to get the driver info,
this commit also reorganizes a bit getting a GrContext when there's
no actual window, so that it's usable for the test.

Change-Id: I042af0470fb635d8ea471a40837bfcd102d7016f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88205
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions