1) Changing the BuildMetadataFromXml to only set
same_mobile_and_fixed_line_pattern and
national_prefix_optional_when_formatting if they differ from default
values, and the domestic_carrier_code_formatting_rule,
international_prefix and national_prefix_formatting_rule if there is
one.
2) Adding a test with some golden data for the BuildMetadataJsonFromXml.
3) Adding to the proto a missing explicit default false.
4) Updating a couple of methods in the Phonemetadata.java class to have
names that match those of the auto-generated Phonemetadata used by the
CPP build, now that we use those methods when building the metadata.
5) Fix to ant build file to enable the junit command to still work (instructions on open-source on how to regenerate metadata files refer to this)
Resulting data is smaller for Java and C++ and the resulting BuildMetadataJsonFromXml code is cleaner.