The point is, if you build a signed app meant to run on any device, you are going to include code/assets for all of them. What Google wants to do is basically "

The point is, if you build a signed app meant to run on any device, you are going to include code/assets for all of them. What Google wants to do is basically "tree-shake" the APK so that when you download it, it only contains what you need for your device.