I didn't say third party code but third party binary. That's not the same thing, there are plenty of third party libraries used in iOS indeed. But, you must recognize that's highly unusual for Apple to bundle third party software in iOS and even more when the type of software is by nature highly risked and highly controversial such as logging/tracking softwares are.
Really? Based on the "Legal" section of my 3rd gen iPod touch, there appears to be a bunch of third-party binaries integrated into iOS.