In most of your examples, the answer is no because of economies of scale; hardware fabrication only makes sense because of economies of scale (and to a lesser extent pipe or packaging production - although you could ask the same question about vertical integration all the way up the petrochemical supply chain to operating oil rigs and refineries).
Most game dev companies just aren't big enough to need enough hardware for vertical integration to make sense. Most water companies aren't big enough for a pipe factory to be economically viable, let alone building their own minerals division, oil rigs, oil refinery and chemical plants.
I suspect that security and running cafeterias do have economies of scale (e.g. a business might only need a drive-by check a few times a night, and so it is more efficient to have one guard drive around different businesses than for each business to hire their own guard), but Google's demands for security and cafeteria services are probably high enough that they gain many of the same benefits of the economy of scale.
Allowing management to focus on core competencies is also important for smaller businesses, but eventually most decision-making is delegated to middle managers or even subsidiary companies, so the top tier of management doesn't have to worry about it. For big companies like Google, it is likely that they have modelled it, and worked out it will cost them less to vertically integrate this function.
Businesses generally have far more efficient control over employees than contractors, so if they are unhappy with something, they can just change it rather than needing to renegotiate a contract.