Google suffered one of its biggest setbacks on Wednesday when a top European court fined it 4.125 billion euros ($4.13 billion) for using its Android mobile operating system to thwart rivals, offering a precedent for other regulators to ratchet up pressure.Google suffered one of its biggest setbacks on Wednesday when a top European court fined it 4.125 billion euros ($4.13 billion) for using its Android mobile operating system to thwart rivals, offering a precedent for other regulators to ratchet up pressure.