I'm afraid saves on android are a bit tricky. They're stored in the system files and can't be moved or replaced by normal means, nor can you use your steam save on android or get your android save to a different phone later. So if you're worried about losing your save file, android is the only system you might want to avoid.
Some people use joiplay to play the game on their phones, which I haven't tried yet but may have a different save file location.