Migrate to cargo_embargo. am: 0e6f36886f am: 5097bb2594 am: f56b1fd10b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/scopeguard/+/2828110

Change-Id: I1ee8abfa7af585aa3ef9ddb3eb3fe0a9b7ececc5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>