With a new mixed-use development in the works on Baltimore Avenue (Route 1), change is in the wind. A Whole Foods Market is scheduled to open next year at Riverdale Park Station. Other businesses that have signed leases include Old Line Bank, Bella Beach Spa, Burton’s Grill, Jersey Mike’s submarine sandwich shop, the Habit Burger Grill and District Taco, according to H&R Retail, a real estate brokerage firm.