Support filter expressions consisting of basic comparison operators in DevGetObjects(Ex).
-- v9: cfgmgr32: Implement support for basic filter expressions in DevGetObjects. cfgmgr32: Validate DEVPROP_FILTER_EXPRESSION values passed to Dev{GetObjects, CreateObjectQueryEx}. cfgmgr32/tests: Add some tests for calling DevGetObjects with filters. cfgmgr32: Implement DevFindProperty. cfgmgr32: Add stub for DevFindProperty.