Update TEST_MAPPING am: 51b265d07a am: f1b8423cf4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/codespan-reporting/+/2107313

Change-Id: Ie9834f78f9775d79db45b74685ddc65d0d0e3ed9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>