Merge "Upgrade rust/crates/num-bigint to 0.4.2" am: ad0d63d6f8 am: 4826407ebf am: d174b394a3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num-bigint/+/1832702

Change-Id: I0c9dc252faf95deb5ccee9060083a09782d7dcf8