Migrate to cargo_embargo. am: a4c1350c71 am: a83b95d3cc

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tracing-attributes/+/2836876

Change-Id: Ie5559259c94467546da1e6eb09d5ec3774972dcf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>