Update TEST_MAPPING am: 7ca29e57c7

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/linked-hash-map/+/2107430

Change-Id: Ie5fe4afff53f33de932719f5568a8eb82da57ece
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>