Migrate to cargo_embargo. am: b71722ff58

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/itertools/+/2796435

Change-Id: Id050b974835e15df0f62b180e4f6e4628a83ac1a
Signed-off-by: Automerger Merge Worker <[email protected]>