About the android just log out, If it is not sign with your facebook, i think it will not be saved.

About your friend, even If he deletes it from is facebook, the game continues with the Team for more 3 seasons If i am not wrong, you can not do nothing about it. My sugestion is, use it to play friendlies. I have a friend abandoned Team 1 level above mine, all the days that i only have 1 oficial game, i play a friendly with it, since it is much weaker i always win, and give minutes to my subs. That way i also gaine 3 blue packs, 1 green, and with some luck 1 red.