What would be your suggestion to include Android 9?
A good choice for compatibilities issues: [for android 4.0 until 9.0.x]
1) NDK API <= 22 [keep here, otherwise 4.x will break!]
2) MinSDk API = 14 [keep here, otherwise 4.x will break!]
3) Target API = 26 is the min required by "google play" store,
but you can go forward to API 28 (Android 9)!