well, triple boot would be good but the issues arising from pre-installation would be time consuming. I would suggest a flash drive with the installation of all 3 and a choice at first boot which combination you want.
Purist Windows fans can have a single OS, so can purist Linux and purist Android fans - but the more geeky and/or advanced can have any combination via tick boxes.
Alternately as Windows is the only commercial software and therefore requires a COA sticker that should be pre-installed and the Linux and Android are on a flash drive as add-ons after first bootup.