Migrate to cargo_embargo. am: 59d61a5fc0 am: ec6ca2494a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/unicode-normalization/+/2828013

Change-Id: Ifdbf1090faa238f090198c28951a93427cc3a239
Signed-off-by: Automerger Merge Worker <[email protected]>