Update TEST_MAPPING am: 32c3be277b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-core/+/2107429

Change-Id: If65044e796caaee64bfbca4ee938647e69c3111b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>