added voice chat listening duration feature

[PrathamLalwani]

I added the requested feature to either disable or increase the length of voice input duration, for this issue #197464.

Although I have implemented the said feature I couldn't have tested it because there is no microphone option when building locally.

[PrathamLalwani]

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[PrathamLalwani]

I have changed the mentioned lines and I have done it so in a way that in future more options can be added easily.

[Benjamin Pasero (bpasero)]

Thanks!