Update TEST_MAPPING am: 889f84a938

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rand_core/+/2411618

Change-Id: I3003ad528a5ee2f9c86bc87b32b4e42dd912be22
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>