Audio Interceptor

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# Tell us about your request
## What do you want us to build?
Which Amazon Chime SDK or feature area is this request for?
Looking for a feature where we can intercept the receiver or sender's audio and get it as an audio file.
Will be helpful to do some processing like storing the recording in a mobile device / else use some 3rd party transcription services as well.

## Tell us about the problem you are trying to solve and why is it hard?
I am looking to intercept a speakers audio and play it as individual audio as a part recording of the conversation thread.
like below image


## How are you currently solving a problem?
Not finding any solution.

## Additional context
Chime's transcription service is not accurate as some other services especially in Japanese

The issue names no file, test, or entry point. Start by mapping how the Android SDK handles sender and receiver audio, then determine the supported interception boundary and recording requirements. Done would require an agreed design and implementation for obtaining individual audio streams, with tests and documentation.

Written by the indexing model from the issue text.