Adding '_nostd' variant for ring crate. am: 630e65a949 am: cd16eaefb1 am: 26e47090e9 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ring/+/2797497 Change-Id: I99536dfd3747ef4f0dbfeda9fb2c1f756f54dfbe Signed-off-by: Automerger Merge Worker <[email protected]>