Merge "Clean up rust_test_host TEST_MAPPING after default update" am: 1406677ddd

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/lazycell/+/1589996

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9e6f649e59d802efc1d9fe2e3d9d018f2f6fcb14