When developing for Android devices, you have several Texture Compression options to choose from. You can also identify 16-bit, 32-bit, or 32-bit half resolution as the ETC2 fallback. You can use the internal Build System or Gradle, which is a build tool used in Android Studio and elsewhere:
You will also decide whether this is a development build or not. If it is, you will have the additional options of Autoconnect Profiler, Script Debugging, and Scripts Only Build.
You can learn more about developing for Android devices here: https://developer.android.com/.
