Merge "Upgrade rust/crates/structopt-derive to 0.4.16" am: 6a8fd71e87 am: 5162c84530 am: 08b93b9202 am: 3ad58637ab am: e7e7f4dfc1

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/1833387

Change-Id: I9e0344d62efc4c97da9f48004902ca239a08fd23