aml_tz4_332714070 (11568890,com.google.android.go.tzdata4,com.google.android.tzdata4)
Merge "Update structopt-derive to 0.4.18" am: e8905e91b8 am: b74cbda041 am: 6c9e7633f0 am: b2b6c71cca

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/2005115

Change-Id: I2f5b0666b51e3c4f1b64a1c9b32b8489143d53ef