Migrate to cargo_embargo. am: ade89fb953

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/sec1/+/2832812

Change-Id: Iedb260e2de6924d3b33d1a02b9e8c09e313e8ca5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>