Merge "Clean up rust_test_host TEST_MAPPING after default update" am: 7d71471018

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rand_xorshift/+/1583344

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I12b67df5fe6155b484728e3211eed49c4f22f4ed