Revert "Import xml-rs 0.8.3" am: 2fc140166d am: 7a738ad874 am: 47f6bbb6c3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/xml-rs/+/1769145

Change-Id: I7f8f290b89e33cab812aa4079a6fbb42032f626d
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

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