Merge "Do not synthesize events for relative mouse movement."

                final MotionEvent event = (MotionEvent)q.mEvent;

                final int source = event.getSource();

                if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {

                    // Do not synthesize events for relative mouse movement. If apps opt into

                    // relative mouse movement they must be prepared to handle the events.

                    if (!event.isFromSource(InputDevice.SOURCE_MOUSE_RELATIVE)) {

                        mTrackball.process(event);

                    }

                    return FINISH_HANDLED;

                } else if ((source & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {

                    mJoystick.process(event);