Adapt APK build to Qt 5.15.8
This should fix the binary factory build, but it unfortunately not backward compatible below Qt 5.15.8. Qt 6 will need the same changes anyway, so it's not all bad at least.
This should fix the binary factory build, but it unfortunately not backward compatible below Qt 5.15.8. Qt 6 will need the same changes anyway, so it's not all bad at least.