wined3d: Use backup swapchain DC for devices created with desktop window. (try 2)

[Adam Jakubek]

Previous version failed on test bots.
Added test case skipping when no device can be created with normal
(non-desktop) window.

---
 dlls/d3d9/tests/device.c |   59 ++++++++++++++++++++++++++++++++++++++++++++++
 dlls/wined3d/context.c   |   10 +++++--
 2 files changed, 66 insertions(+), 3 deletions(-)
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