unbundle: add //services/data_decoder:lib to libxml_utils visibility

Also add a note to keep original and unbundle BUILD.gn files in sync.

Bug: 1306942
Change-Id: I83a57abfd7f2390232b1cf81060d79595f2aec55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3488058
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Stephan Hartmann <stha09@googlemail.com>
Cr-Commit-Position: refs/heads/main@{#995726}
NOKEYCHECK=True
GitOrigin-RevId: e67b31a6d61ec67c3cd89832a96e266f3470b5f0
1 file changed