Google accused European Union antitrust watchdogs of blundering their way through a probe that culminated in a record €4.3 billion ($4.5 billion) fine for allegedly abusing the market power of its Android mobile-phone ecosystem. At an appeals hearing at the EU’s Court of Justice on Tuesday, lawyers for the Alphabet Inc. unit slammed the European Commission for making “grave errors,” failing to take into account that Android’s success stemmed from successful innovation rather than brute force....