contrib(win32): use WASAPI as the only PortAudio host api

The DirectSound host api implementation in PortAudio has multiple
issues:
- requires utf8 support patch
- can't enumerate the default communication devices
- reports incorrect default sample-rates for devices

The WASAPI host api implementation needs to be patched to access
the default comm devices, but functions better out-of-the-box.

Change-Id: Ie27ee3e1418dd6d734ad6ad7685f2dc44db86007
Gitlab: #463