[aqfamnzc]

If the NSA chip you describe exists, it's in every android phone. I don't see why it's any more likely that a google product would have a government backdoor than any other manufacturer. (More likely that it's an IP block in the processor rather than a discrete package "chip".)

That leaves backdoors created by and for Google, concern for which I suppose your comment still applies. It seems less likely to me though...