Include XmlDom.h for xml::XmlResource

The ~InlineXmlFormatParser method needs the complete class type so it
can destruct the queue_ field.

Fixes a build failure that happens after upgrading libc++.

Bug: b/175635923
Test: treehugger
Change-Id: I9f8e0c3535f6f015b322e12bdc8484b1b5dda09c
1 file changed