Update TEST_MAPPING am: 5aee022810

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/serde-xml-rs/+/2108624

Change-Id: I3515c89bef8f24dab60d68c665ede783a06582dd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>