Google will overhaul the service that built the company into a $2.1 trillion technology juggernaut — its online search. The curtain has just fallen on a two-hour keynote with high-profile executives at Google I/O, the annual developer conference held by the company to announce new software features and hardware. And this year was all about Artifiticial Intelligence (AI). Google unloaded a barrage array of new AI-powered products, including new video and image creation tools. But the biggest announcement of the night was confirmation that Google would start to rebuild its search engine around g…