Trying to fix an override related error

frameworks/opt/telephony/src/java/com/android/internal/telephony/IccSmsInterfaceManager.java:50: com.android.internal.telephony.IccSmsInterfaceManager is not abstract and does not override abstract method synthesizeMessages(java.lang.String,java.lang.String,java.util.List<java.lang.String>,long) in com.android.internal.telephony.ISms
public class IccSmsInterfaceManager extends ISms.Stub {