Migrate to cargo_embargo. am: 23655b5905 am: ea6b1b57ec

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/merge/+/2796418

Change-Id: I02581b66c71e1b217cd771420e4465fe4bf9c4e4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>