Restore default Windows audio driver (WASAPI)

[StephenCWills]

With the SDL 2.0.18 change to use the built-in WASAPI audio resampler (libsdl-org/SDL@ac32c52) and the recent vcpkg update to move from SDL 2.0.16 to SDL 2.0.20 (microsoft/vcpkg@9eb76eda), this seems like a pretty good time to reintroduce WASAPI.

While testing various audio settings, we found that resampling quality can have a pretty significant impact on game performance. Therefore, I'd also like to propose reducing the default resampling quality from 5 to 3 based on guidelines found in the Speex resampler documentation.

https://speex.org/docs/manual/speex-manual/node7.html#SECTION00760000000000000000
Usually, a quality of 3 is acceptable for most desktop uses and quality 10 is mostly recommended for pro audio work. Quality 0 usually has a decent sound (certainly better than using linear interpolation resampling), but artifacts may be heard.

See also:
#1434, #1435