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1d7776c4 - Handle returning the current stream with/without device index (#165356)

Handle returning the current stream with/without device index (#165356) Summary: X-link: https://github.com/pytorch/pytorch/pull/165356 Approved by: https://github.com/anijain2305 ghstack dependencies: #164819, #165211, #165212 Reviewed By: donigian Differential Revision: D86056516 fbshipit-source-id: 8509369a395b4489ae1c11919c38edd85073ab36