Migrate to cargo_embargo. am: b8374cfeae am: e3ca407806

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/idna/+/2822155

Change-Id: Ia141995785282887cec9d4c945f650d73345ce36
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>