It's the same here in SE Asia. I suspect that's because most people don't have the money to buy a Mac for iOS development but already have a PC of some kind and often a cheaper Android phone. Also, most university graduates here already know Java so they can start writing apps without having to first learn an exotic new language.
In Germany it's a PITA to find good Android developers... Good iOS developers on every corner but even average Android developers are hard to find. We also overall experienced a much slower development workflow with Android.
Interesting, since at our teams we haven't found significantly slower dev times on Android in comparison to iOS. Usually Android devs lose time on compatibility issues, while iOS devs take more time with UI/UX design.
But I agree, finding a good Android developer here in central europe is rather hard. Also finding a good Android job is rather hard - payment offers are usually atrociously bad.
Around here (Central Europe, Austria) it's the other way around. It's a little bit harder to find good Android jobs than iOS jobs.
Maybe because Java has always been one of the more popular languages here and the amount of Android devs is just higher than the number of iOS devs.