Initial import of form_urlencoded v1.0.0 am: 6d73de0679 am: da6fecba5f am: f69374e3c3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/form_urlencoded/+/1533346

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iae366ce0981618cf72f010b4802e20c3aab425a5