Two years after Erica Tishman was struck and killed by a piece of terra cotta that fell from 729 Seventh Avenue, the building’s owner faces criminal charges for allegedly ignoring its hazardous conditions. After learning of “deteriorating façade conditions that posed an immediate danger to the public,” the owner, an entity tied to Himmel + Meringoff Properties, failed to install a sidewalk shed and make repairs, the Department of Buildings said Thursday. On Dec. 17,