Initial import of matches v0.1.8 am: 3d4b232b1b am: 621a42bf95

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/matches/+/1534338

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9059527ff0274e06828191bada93367ae796d312