If Google’s generative AI Gemini Assistant chatbot is to surpass OpenAI’s ChatGPT in popularity in the coming years, it may have to do so without some of the promotional partnerships that helped thrust Google search front and center into Americans’ lives.In a US federal court filing on Friday, Google proposed a series of restrictions that for three years would bar the company from requiring its device manufacturer, browser, and wireless carrier licensees to distribute Gemini to their US users. Google also would give those partners more flexibility in how they…