In 2018 and 2019 Google do some changes for app publishing, that will also impact cocos2d-x development.
- Mid of 2018 the targetAPI has to be the lastest (or one below) API level, so it has to be at least 26.
- Mid of 2019 every app with native code has to be build incl. 64bit
The first one is not the important, because the latest github build is against 27, but the template should be extended to also build 64 bit by default.