Update TEST_MAPPING am: c8eb729dcc am: db9f687954 am: 54b7c8f198

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rustc-demangle/+/2108604

Change-Id: Iebf03ea66b0fd78ee9f174e5b2b07c5f512cf19b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>