Merge "Upgrade rust/crates/ring to 0.16.20" am: b8b8a93bc2 am: 069ac96cc0 am: 444b3e4e55

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ring/+/1746781

Change-Id: Id51c956712433a317bc37b19d29fc45fcecc4fca