Migrate to cargo_embargo. am: e0fa966410 am: 5fd703374a

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

Change-Id: I4d93ffab68c97d00ed904c382928dd58455053e6
Signed-off-by: Automerger Merge Worker <[email protected]>