Correctly parse named_is_latest entries from the pushdb

The named_is_latest entry was being implicitly str()d on the way into the database, but was defaulting to a boolean on the way out. Strings are "truthy", so the "False" string would be treated as true.

Reviewed at https://rbcommons.com/s/twitter/r/1245/
Migrate jar_publish to new options.

Testing Done:
CI passed. Ran jar_publish's unit and integration tests. The integration tests exercise most of the flags.

It's a bit hard to test manually because parts of jar_publish are broken for other reasons. But we're pretty confident about migration changes at this point.

Reviewed at https://rbcommons.com/s/twitter/r/1276/
Add support for the Wire protobuf library.  Adds the java_wire_library() target.