Google CEO Sundar Pichai. Bloomberg/Getty Images Google's subscription business saw its strongest quarter yet. YouTube and AI features tied to Google One were the biggest drivers. Subscriptions are becoming an increasingly important business for Alphabet. Google said it now has 350 million paying subscribers across its services — another boost to what is becoming an increasingly important part of the search giant's business. The company's subscriptions, platforms, and devices business grew 19% year over year in the first quarter of 2026, Google said on Wednesday. That was in line with the 19% growth that Google also saw in Search. That jump for subscriptions was primarily driven by YouTube and Google One, the company said.…