Migrate to cargo_embargo. am: b8374cfeae am: 8d97986422

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

Change-Id: Ie11635765174b32bb7ece9ac2dd9525015118eec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>