Migrate to cargo_embargo. am: ade89fb953 am: b2934dc178

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

Change-Id: I6f743b7dac3e39c1754d270ebcd96113f39165e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>