Upgrade xml-rs to 0.8.19 am: bf78730a13

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/xml-rs/+/2854949

Change-Id: I317d914b9cf5339706f76ce13c17d3923e1d0654
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>