Update TEST_MAPPING am: 862db4a500

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-macro/+/2107053

Change-Id: Ifedb068feefdd94a90f16f11d904feb50a081b3c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>