Update TEST_MAPPING am: 76e56e04a6 am: f97d116cb2

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/thiserror/+/2398876

Change-Id: Ie8114c3936bec75adb1fe36bf5c4b18f24c6e6e5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>