Support for AWS Transcribe

[supriyo-biswas]

AWS Transcribe is a cloud-based speech transcription service: http://docs.aws.amazon.com/transcribe/latest/dg/what-is.html

Since I see that there are many other cloud based services in the list, can we also have AWS Transcribe supported by the extension?

[dessant]

AWS Transcribe jobs require the audio to be uploaded to S3 before recognition. Streaming transcription supports sending audio data directly to the transcription API, so that would be preferred.

https://docs.aws.amazon.com/transcribe/latest/dg/API_streaming_StartStreamTranscription.html