Migrate to cargo_embargo. am: 99d47778c2 am: 6b4947a082 am: cabb9038e9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/unicode-width/+/2828074

Change-Id: I3e25966bf76244824c0aaa4698735c2d4df1839c
Signed-off-by: Automerger Merge Worker <[email protected]>