Revert^2 "Import xml-rs 0.8.3" am: a7cd2385b5 am: bc912d593e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/xml-rs/+/1769186

Change-Id: I6eed35c8ea912cb2d58ce5aa6c4b4b2549aa2015