This extension is not available on Android, there they have
VK_GOOGLE_display_timing, which they also have an abstraction library
for, so will look at that later.
Early part of work on #17685
Fixes#17014
Even if our depth-testing-equal heuristic believes that the game needs
lower depth resolution.
This removes some depth-fighting artifacts (that are present on the real
PSP, but nice to avoid) in Outrun, Split/Second and Cars: Race-o-Rama -
essentially reverting these to the behavior we had before the heuristic.
(The heuristic is good though - it means less compat.ini hacks going in
the other direction).
In the case of Outrun, this relies on two passes that pass exactly the
same vertex coordinates twice resulting in the exact same final
geometry. This is actually guaranteed by the spec if the vertex math is
exactly the same and "invariant" is set on the position output, though
I guess you never know.. Haven't seen any issues at least.
Also sneak in disabling some validation messages from using extra Vulkan
validation layers other than the default.
This shouldn't normally happen as conforming drivers are required to
support that texture format, but the software driver that we
accidentally choose on Poco C40 (see issue #16391) doesn't.
That we choose that driver will be fixed separately. This fix on its own
at least lets the user comfortably navigate to settings and switch to
OpenGL.
