WASHINGTON — Internet service providers like Comcast, Verizon, AT&T, Sprint and T-Mobile now must act in the “public interest” when providing a mobile connection to your home or phone, according to rules approved today by a divided Federal Communications Commission. The plan, which puts the Internet in the same regulatory camp as the telephone and bans business practices that are “unjust or unreasonable,” represents the biggest regulatory shakeup to the industry in almost two decades. …