Enable feature std for ring am: 0d2595cd2a am: 67aa9d1409 am: 671c37d075 am: 8bb9bc5bbb

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ring/+/1657099

Change-Id: I4e99b442313d21afea0e842e5499bf40f77727f5