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Summary:
Add metadata, such as ID3 (https://github.com/pytorch/audio/commit/7d98db0567cb60fabcc173949b8c08e3a3487ac2)tag to `StreamReaderSourceAudioStream`.

Pull Request resolved: https://github.com/pytorch/audio/pull/2461

Reviewed By: hwangjeff

Differential Revision: D36985656

Pulled By: mthrok

fbshipit-source-id: e66f9e6e980eb57c378cc643a8979b6b7813dae7