Update tests to account for sample count defaults.
Update tests to account for sample count defaults.

chinmaygarde/flutter_engine,rmacnak-google/engine,rmacnak-google/engine,flutter/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,rmacnak-google/engine,flutter/engine,flutter/engine,flutter/engine,rmacnak-google/engine,devoncarew/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,devoncarew/engine,flutter/engine,flutter/engine,chinmaygarde/flutter_engine,flutter/engine,devoncarew/engine,rmacnak-google/engine,devoncarew/engine,devoncarew/engine,devoncarew/engine,chinmaygarde/flutter_engine,flutter/engine,rmacnak-google/engine,rmacnak-google/engine,devoncarew/engine