Migrate to cargo_embargo. am: 8ba44e9aae am: 74075eaf4f am: a439db09f5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/crossbeam-epoch/+/2829795

Change-Id: I3a7c6c802b22a8a440bb83b6210e7170cdf80050
Signed-off-by: Automerger Merge Worker <[email protected]>