Update TEST_MAPPING am: e899c8c6c4 am: a2d7656c61 am: 84371aee96

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-macro/+/2399355

Change-Id: I30fe2633f96ed271d60fb4fcf402deb72b8b3ce5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>