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

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

Change-Id: I2a2d23a4575040794953ce7f7b06c47222ccc7ab