structuredquery is required to support AQS filters in Windows.Devices.Enumeration's `FindAllAsync` methods, and this stubs adds a basic set of stubs to get the ball rolling.
-- v7: dlls/structuredquery: Add stubs for IQueryParserManager. dlls/structuredquery/tests: Add basic conformance tests for IQueryParserManager. include/structuredquery.idl: Add IQueryParserManager. dlls/structuredquery: Add stubs for QueryParser. dlls/structuredquery/tests: Add basic conformance tests for QueryParser. dlls/structuredquery: Add stub. include: Add structuredquery.idl.