Upgrade rust/crates/regex to 1.4.2 am: 1d704cd422 am: 5fbbca0125 am: f87a1529af

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/1485296

Change-Id: Iaf77771e27442b3efa0632458f1cda3e01c73e53