I'd start with this:
... as the problem at hand has been fixed ...
Yes, if you solved a problem yourself, you're always encouraged to post a self-answer (and accept it if appropriate).
The goal of Stack Exchange is to build a library of knowledge to help not only the question asker, but more importantly, all future visitors to the sites. Therefore any potentially useful question and solution (answer) should not be left out just because no one cares at present. It's meant to be valuable to the future.
On the other hand, neither option 2 nor option 3 would be appropriate, as the question is of a decent shape and doesn't warrant closure or deletion. Option 1 may be acceptable, but why would you ignore it when there are better options available?
Congrats on your first self-answer then! 🍎
This answer probably looks like an expanded version of Izzy's comment, but I believe that it'd be because this is the general feeling or consensus that the Android Enthusiasts Stack Exchange community would have.