Initial import of tokio_stream am: c0f49ebcec am: 2d0ffc896f am: 08c523d730

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio-stream/+/1558921

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic00ee130aa50bb78dbf8c1e860eb129843485dd9
tree: 08efa1ccbef1a7ef36c8b30afc594f438eecffd9
  1. src/
  2. tests/
  3. Cargo.toml
  4. Cargo.toml.orig
  5. CHANGELOG.md