!8598 will require some more work, so I wrote a number of tests in preparation for it. There will be another MR for capturing tests.
This MR also enable 32-bit PCM samples for PulseAudio, since they're already enabled for other drivers and it's useful to have some uniformity between the drivers in order to avoid making writing todo conditions even more of a nightmare than it already is. 32-bit samples are already enabled to extensible wave formats, so it doesn't seem intentional that they were not enabled for non-extensible formats.