It's more complicated than that. He offered to go to Sweden to face charges on the proviso that he was guaranteed to not be extradited to the United States. Sweden refused, the charges expired and the US extradition process started in the UK.
https://en.m.wikipedia.org/wiki/Assange_v_Swedish_Prosecution_Authority
Android and iOS are walled gardens so they hardly count. Both are mostly proprietary these days with an "open core". When I think of Linux on the desktop, Linux for daily computing etc. I think of an experience that is interoperable, FOSS and respects my digital rights.