Migrate to cargo_embargo. am: 147d7ea1fc am: e1d1b7766f

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

Change-Id: Icd9d16f1721e67ca54d5533734656b6acc43b0e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>