Gracefully disable audio when no audio devices available

[reinux]

Opening Gaia or a game over Remote Desktop with audio disabled causes an exception:

2023-10-15 05:19:54.1019|Trace|SDL2# global resource creation failed due to 'WASAPI can't find requested audio endpoint: Element not found.'.

[bryanedds]

Does it work when audio is enabled?

[reinux]

Yeah, runs fine when I enable audio in RDP.

[bryanedds]

Been thinking about this. Not sure if we want to support this scenario where a device does not expose basic features like audio, rendering, etc. We'll keep this issue around though as perhaps we might change our mind.