So this is coming from Google. Their motivation is much harder to discern. Related to advertising? Avoiding store segregation as they expand into e.g. various far more conservative Asian or Islamic nations? Trying to create a 'Disney-Esque' image for Android as opposed to being that naughty back alley alternative to Apple? Maybe it was an algorithm or even human gone awry. Lots of possibilities, and we'll likely never know which it was - even if they choose to respond to this.