A 35-year-old Burlington County man was arrested Monday after he was accused of sending child pornography files from his phone to others, authorities said. Gregory Chesko, of Burlington Township, was charged with second-degree distribution of child sexual abuse material, second-degree possession of child sexual abuse material with intent to distribute and third-degree possession of child sexual abuse material, the Burlington County Prosecutor’s Office announced Tuesday. The National Center for Missing & Exploited Children tipped the office about Chesko’s alleged online activities, officials sa…