https://arstechnica.com/gadgets/2017/12/google-fights-fragmentation-new-android-features-to-be-forced-on-apps-in-2018/

While Apple's app store is heavily regulated, the Google Play Store has mostly lived its life under Google's laissez-faire attitude. As long as you didn't get caught by Google's malware scanning, your app was free to do just about anything.

But lately, Google's hands-off approach seems to be changing. The company tried to restrict Android's powerful accessibility APIs only to accessibility apps, but after a power user revolt, Google is currently rethinking that plan.