Migrate to cargo_embargo. am: 14d1b44383 am: 125543561a am: 813ff2232a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/unicode-segmentation/+/2828152

Change-Id: I489eff4e81812d4ab26e491d05a1b840b8311d0f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>