Ah right, I get where you're coming from now. This is actually an issue that will be fixed in an upcoming version. The check at the beginning of the game is currently too strict, as it doesn't account for players who already have saves made in Season 2 stored on their device. The game's engine actually needs the Season 1 save only to import your progress, as soon as you make a new save based on that older data, it will store everything in the new saved game. So while the "saved state" concept makes sense, it isn't actually what's happening under the hood. v0.16 will have less stricter checks to allow people to play Season 2 with just their Season 2 saves.
As for the grouchiness regarding working with files in Android, I can wholeheartedly relate. ;) Fixing this issue was a very painful mental experience, to say the least.