When doing a module build, Titanium will auto-download NDK r20b (aka: 20.1.5948944) by default if NDK installations were found on the system.
The default should be updated to NDK r21c (aka: 21.2.6472646).
The macOS distribution of the Android NDK r21c tools have been "notarized" by Google. This means module builds will no longer display several security popups on macOS Catalina.
Update the android.ndkVersion here...