A 38-year-old man previously convicted of voluntary manslaughter was driving with methamphetamine and heroin in his system when he lost control of his car in Irvine and crashed, killing his 18-year-old niece, a prosecutor told jurors Wednesday, while the defendant’s attorney said his client should not be convicted of murder. Jim Christopher Rosado is charged with second-degree murder and driving under the influence of a drug causing injury, both…