You may be seeing Linux from server locations since that's usually the OS of choice with admins and techies, but I have a Linux machine that connects with Cox Cable (as do several of my friends.)
But Android would certainly be coming from any ISP, private or business account. My mobile phone is Android and connects with T-Mobile, my netbook is Android and connects with Cox Cable but could just as well be Comcast, Verizon, Turner, Yahoo DSL, ATT, etc.
I wouldn't trust Android - it's bug-ridden in the extreme. However:
Both IP ranges given are google - I have both ranges blocked as very undesireable (feedfetchers, translate, web previews etc).
Wilderness - you do not give a UA. If the UA has the words "web preview" in it then it's G's web previewer and, in my personal opinion, expendable. If it's true android or linux on those ranges then I would expect it to be some other kind of bot or G busybody.
I do not see many humans using linux; they do exist (eg me) but seem to be scarcer than Macs.
I would not expect techies to be browsing as themselves from servers, although I do know that one or two poorly setup organisations do this (eg UK yellow pages, though not with linux).
If it's linux and server then I would block it (for the server part alone). If it's android and server then suspcious and probably fake UNLESS the server IP is a proxy for one of the (eg) phone companies or possibly SE (I block G and yahoo mobile proxies as a source of mischief). If it's google anything it SHOULD be blocked but that probably isn't a good idea for a few more years I now block all G IPs except known bot ranges. :(
One good check for linux: how old is it and what browser does it (pretend to) use?