Migrate to cargo_embargo. am: 147d7ea1fc am: 77db7dff0f am: 0d3092bc29

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/codespan-reporting/+/2822238

Change-Id: I4004c56efd8256834e8383ed9339b2337a164562
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>