Migrate to cargo_embargo. am: 6192ef513e am: fba37d6f1c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/config/+/2822893

Change-Id: I9b1492085ca540f749344703bbe90c6c58a39625
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>