A mother and son from Newark were arrested Tuesday after a quartet of early morning raids in the city, and another at a Bloomfield apartment, yielded more than 10,000 vials of cocaine and another 640 grams of unpackaged coke, officials said. Edwin Medina, 32, and his mother, Sandra Almodovar, 51, were charged with first degree possession of a controlled dangerous substance with the intent to distribute, possession of a handgun while committing a narcotics offense and various other drug-related offenses, according to a release from the Essex County Prosecutor’s Office. Detectives from the offic…