Bug 1663917 - Remove special case on Windows for VOICE cubeb stream. r=kinetik

This [0] commit unties the device selection from the fact that a stream
transports voice data. Telling cubeb that the stream has voice data allows
lowering the complexity of the resampler, and lowering the impact of the
resampler on the latency.

[0]: https://github.com/kinetiknz/cubeb/pull/598/commits/ac3569ef18a911d45ebb4a5cfbd5d716ac519787

Differential Revision: https://phabricator.services.mozilla.com/D89591