Android doesn't affect media players directly. Also, even with biggest market share, as far as someone with smaller but still significant market share sabotages codecs adoption - there is a problem. Only if Apple will become completely irrelevant as in "can be ignored", then it won't affect the situation. But so far it didn't happen yet.

Surely Apple aren't alone in causing these kind of problems, but they are a major factor.

They managed to sabotage open codecs for audio and video tags in W3C, but now there is some hope that WebRTC will make open codecs part of the standard, and Apple will be forced either to follow the standard or admit they are jerks.