Update TEST_MAPPING am: 88f13915e1

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/codespan-reporting/+/2411856

Change-Id: I7e553713852a1328f76a315a1849c6a975d6d6bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>