Migrate to cargo_embargo. am: 4a9384f6a9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pathdiff/+/2824493

Change-Id: Id507bac0feb61da07767d9c062bca87a952d2811
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>