Migrate to cargo_embargo. am: e0fa966410 am: 5fd703374a am: 65e7432550

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/combine/+/2826452

Change-Id: I584b274e482fd1f38e46c3f80349f6f8887e687e
Signed-off-by: Automerger Merge Worker <[email protected]>