Upgrade ryu to 1.0.16 am: a50ba9b6c7

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ryu/+/2952998

Change-Id: I13ac29f8284171ff16d0dce1eddb5130e0b91787
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>