Also, remember that in practice, the vast majority of people downloading applications on Android are doing so through Google Play, which charges the same 30% fee for both apps and in-app purchases. If people resent Apple more than Google in this context, it's probably more to do with the companies' respective public images than concrete reality.
I suspect you're remembering recent news about Apple preventing Facebook from putting a notice in the Facebook iOS app about Apple taking 30% of the cut from event tickets purchased through the app. While that was arguably a bad move on Apple's part from a PR standpoint -- lately they've been seriously violating the First Rule of Holes[1] -- there's little indication it's a change in policy.
[1] When you're in one, stop digging.