Upgrade rust/crates/regex to 1.4.1 am: 849e4457e7 am: 7767e43fa4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/1474897

Change-Id: I41d599f8fd2d0436c6b3feb9892f305577e6f8a3