Import lock_api 0.3.4 am: 603c38ee63 am: 4f493bb1df am: d469faea6b am: 256bb871b5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/lock_api/+/1460092

Change-Id: I084e2fb276abf744718b228addce5ab76c94b6bf