Migrate to cargo_embargo. am: 0ee068ce96

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/hashlink/+/2826414

Change-Id: I394332e0cc3e93f31df5052f21246f963d131e8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>