Support for Polly streaming REF: https://aws.amazon.com/blogs/machine-learning/introducing-amazon-polly-bidirectional-streaming-real-time-speech-synthesis-for-conversational-ai/
Support for Polly streaming
REF: https://aws.amazon.com/blogs/machine-learning/introducing-amazon-polly-bidirectional-streaming-real-time-speech-synthesis-for-conversational-ai/