Migrate to cargo_embargo. am: b8374cfeae am: 8d97986422 am: e2aa749b76

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

Change-Id: Ie935475209289eca60960d336208a61fc0e284a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>