Using a cellphone while under arrest in the back of a police car with no officers inside? Those phone calls are not protected by the Fourth Amendment, a federal appeals court has ruled. The 7th U.S. Circuit Court of Appeals upheld an Indiana jury’s decision to convict a man on four counts of drug offenses for marijuana and cocaine possession and intent to distribute and one count of illegal firearm possession. The man contended that recording the talks he had while in a police car — but away from officer …