Yes, you have to do the transition with the PC wallet if you can't do it with the android wallet.
Now that I've got all the information for the transition (I do not want to make any mistakes, because it's a big sum for me), I wonder if there is a time limit until the transition has been done? I could not find any information about this. I mean with time limit, if I do not conduct a transition by day x, then my coins will be lost.