Fix XML DOM test failures and close guard warnings.

Fix KxmlParser to capture the DTD's root element name, system ID and
public ID. This is more robust than capturing the same in the pull-to-DOM
adapter.

Fix close guard warnings in XML tests. Close input streams of resource
files. Don't catch exceptions only to call fail().

http://b/3090550
Change-Id: I7cfafde58cc28af79c48386a4d124803c8791328
9 files changed