Migrate to cargo_embargo. am: b71722ff58 am: 0fb2cb65a5

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

Change-Id: I0e56993059da534c8584976e520d8c9f4bf38b68
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>