There's an FAQ about this that specifically calls out Channel energy. The examlle it gives is that Paladins get "Channel Positive Energy", but not "Channel Energy". The FAQ says that these are different names for the same thing, and so the Paladi qualifies for feats with "Channel Energy" as a prerequisite.
The Oracle's Channel revelation would definitely count as well.
(I'm on my phone so I can't link it now, but you can definitely take improved/selective channel and similar feats, and you benefit from items like the Phylactery of Positive Channeling)