Migrate 25 crates to monorepo. am: 36a2876001

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/3248573

Change-Id: I1491f45cb4fe94c67be76c18b9d424d6999ec3ff
Signed-off-by: Automerger Merge Worker <[email protected]>