NDI Audio support for sending (from the package) and receiving (in the viewer)

[hybridherbst]

Currently, the viewer doesn't support receiving NDI audio streams, and the NDI sender from Klak NDI does not support sending NDI audio streams (see keijiro/KlakNDI#17).

One potential approach here would be to check out the fork by krisrok, both for if it works and for if we can improve it.

1. check if https://github.com/krisrok/KlakNDI/tree/audio-receiver-improvements works on desktop
2. rebase it on our dev branch (https://github.com/prefrontalcortex/KlakNDI/tree/feature/android-targetlevel-32-support) and check if it still works on desktop
3. check if it works on Android

If yes, we could incorporate it into our KlakNDI fork that is already used as a dependency here (because of Android 32 compatibility issues with the original repo).

cc @pfcDorn @pointke

[hybridherbst]

Thanks @pointke and @pfcDorn for making this possible :)