Parcel marshall - disallow RPC Parcels

RPC Parcels need to be interpreted in the context of an RPC session.
Otherwise, they don't make sense.

Bug: N/A
Test: N/A
Change-Id: I7a7b83341372faae357927f1b23be181b2f907af

core/jni/android_os_Parcel.cpp

@@ -549,6 +549,11 @@ static jbyteArray android_os_Parcel_marshall(JNIEnv* env, jclass clazz, jlong na
        return NULL;
     }
 
+    if (parcel->isForRpc()) {
+        jniThrowException(env, "java/lang/RuntimeException", "Tried to marshall an RPC Parcel.");
+        return NULL;
+    }
+
     if (parcel->objectsCount())
     {
         jniThrowException(env, "java/lang/RuntimeException",