Come July, newly built apartments in Goodyear Hall will welcome their first tenants. And it’s likely that the stretch of East Market Street in front will see major changes before the year is out as well.Contractors continue to cut, saw, screw, hammer and drill away to put in windows, wallboard, plumbing, fixtures and do lots of other work at the six-story landmark building, part of the ongoing East End redevelopment of the former Goodyear Tire & Rubber Co.