BF: Fix default audio device not being found

[TEParsons]

Prior to 2024.2.0, if your system audio output sample rate wasn't 48000 then initialising a Sound with default speaker raised an error, as ptb doesn't have a method of getting the system default speaker's sample rate; you can only initialise a speaker with -1 as the index. So with no way of asking "what is the sample rate of the system default speaker?" we're forced to just try to set it up with the default (48000), leading to an error if your speaker didn't match.

To get around this, rather than using an index of -1 to initialise a stream, we simply got the first device found and used its parameters instead. Because we got the device's actual info from ptb, this meant it wouldn't error when initialising, so you'd at least have a speaker. The problem is that the first device found isn't necessarily the system audio, so some people are finding audio playing out of the wrong speaker when it's set to "default".

This solution attempts to retain ptb's default speaker behaviour (by passing it -1), but catching the error and resorting to using the first device found instead. This isn't ideal - if your system audio has a sample rate other than 48000 then you'll still find sound playing on the wrong device sometimes, and there's a lot of console spam (even if we catch errors raised by ptb, it'll still print to the console when it fails).

In the long run I think we need to find a way to identify the system default device and get its parameters before attempting to connect to it. I can't see a way to do that with ptb, but maybe we can use another audio system to get its system name and then match with ptb's indexes from that?

Fixes #6372

[codecov]

Codecov Report

Attention: Patch coverage is 10.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 49.61%. Comparing base (eb5e61b) to head (f775d44).
Report is 11 commits behind head on release.

Additional details and impacted files

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- Hits         30383    30371      -12     
- Misses       30821    30838      +17     

Components	Coverage Δ
app	∅ <ø> (∅)
boilerplate	∅ <ø> (∅)
library	∅ <ø> (∅)
vm-safe library	∅ <ø> (∅)