Update lock_api to 0.4.6 am: 93e109d886 am: 0817750d9c am: 36129edb01 am: 4783e793f2 am: 8f1564262a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/lock_api/+/2005911

Change-Id: I5ec1f97f4bf6fee3ade2d504d4baba3c58485498