NowPlaying*Fragment: Revert the changes to NowPlaying* to fix NPE bug.

Apologies, I need to revert this change, and I'll write a bug on the NPE soon. It was a bad assumption that MPDroid would have no problem connecting after a false return; I know it has something to do with being async, but this stuff is (obviously) beyond me. I should have seen the bug initially, but it doesn't always reproduce.