Migrate to cargo_embargo. am: 73dccea8cf am: cf4ab6e0d7 am: bab407ebc5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/hashbrown/+/2826476

Change-Id: I86738e48864f5e97fdebb65d1553738698ade95a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>