Upgrade rust/crates/regex to 1.5.4 am: 3874808a33 am: 8634f71550 am: df6134fce7 am: 6cd46007e3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/1713148

Change-Id: Ic9da62bc060f217f2502c00466f7d0b1dc847dd0