On Windows, always re-create window for GL or Vulkan

On at least one machine, I've seen SetPixelFormat fail after Vulkan was
used to render to a window, preventing us from creating a GL context.
This is ham-fisted, but solves the problem.

Bug: skia:
Change-Id: I76d0cb26e181304846aa06109c1af768f8363a18
Reviewed-on: https://skia-review.googlesource.com/22740
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed