Update lock_api to 0.4.6 am: 93e109d886 am: 0817750d9c am: 36129edb01

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

Change-Id: I7d75426c3aa2c00678069c7ec4d4a2b43e6534c9