As you surely learned during your study a project has a client who wants to reach a certain purpose and decides about the features and the issues. A one person project isn't a real project. It's more like a hobby.
So my suggestion is you find a company or such that needs some Android program, make a project plan and see that the university agrees with that plan (the right size and complexity to serve as a final project).
I am student of Information Technology. now its my final year in university and i am interested in developing project in android.so please suggest some idea on which should work on.