Add audio support

[coxde]

Describe your suggested feature

For example, Lingva supports play audio (source and target), the audio are fetched from Google. Is there a way to play the audio in Translate You when using Lingva as API?

BTW thanks for your amazing apps!

Other details

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[Bnyro]

I don't really know how to use the uint array returned by the lingva audio request properly, I'm open for help on that!

[gitterspec]

Perhaps it'd be helpful to look at the source of https://github.com/yaxarat/lingvaandroid which seems to implement this?