Add Android.bp and TEST_MAPPING am: dd4ec24ddb am: 6e84b0707b am: 49a769d01c am: e12500a760 am: 3315f7e2a3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/1330173

Change-Id: I3d1485bb8df22c319563e4f566adb718c933bc9d