Report Shows Universities Curtailing Online Piracy By ALEX VEIGA    LOS ANGELES (AP) -- Despite evidence that sharing music and movies online remains popular, a report issued Tuesday by a committee of entertainment and university leaders says universities have made strides the past year to curtail online piracy.    The report, submitted to Congress by the Joint Committee of the Higher Education and Entertainment Communities, highlights steps taken by the universities to tackle Internet piracy but offers few details of their effectiveness...