BILLERICA — A Billerica woman told police she and her best friend were drinking hard seltzer and playing around with a shotgun on Saturday when the weapon accidentally discharged, striking her friend in the face. Sara Wooten, 23, who was handling the gun, now faces multiple firearm charges, while her friend, 24-year-old Meghan Pyles, of Billerica, remains hospitalized, fighting for her life. Billerica Police incident reports state at about 3 p.m…