This wouldn't be in actual community builds of Android, or straight-from-google Android source - so no, it won't be in NitDroid. Phones that do have it had it manually and at least in the case of HTC phones very intricately inserted by the manufacturer into the software. For example, HTC has tiny aspects of this software compiled into their version of the kernel, some part plugs in to the browser, etc. It's not built into Android OS itself.

At any rate, it's stuff like this that led me to making the Monitor Clock for the Advanced Clock Plugin. It reports outbound and inbound traffic as color-coded bars for the interfaces of wlan0, mon0, usb0, upnlink0, gprs0, phonet0, and bnetp0 (as well as the 'lo' interface, though that's not very useful in most cases) - I wished to use raw data from the actual hardware, but lack the knowhow to figure out how to detect that information, so instead I went with the interface packet counts.

Now if some program was spontaneously phoning home in the background I'd have at least some indication something was up, unless it managed to do so only during moments when I'm actively sending or receiving other data over the same interface. I really need to get around to packaging that up and stick it in the repos for the few people who'd want it.