Merge "Update TEST_MAPPING" am: 6cb1157574

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/2123298

Change-Id: Id7588d631673a8f2b02fea819a75e81d2291c647
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>