Migrate to cargo_embargo. am: cbb2c115f9 am: a625e8b1a9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio-stream/+/2828230

Change-Id: Ic34bc67a84d90a100bcfc0ff0263f6933feca3e8
Signed-off-by: Automerger Merge Worker <[email protected]>