While I’m not , I was able to successfully build for Android from version 1.5 and looking at the change logs:
AR Plugin V1.4 – 2016-01-20
– UnpackData function added for Android builds (extracts data from obb to ue4game)
Anything beyond that version should work as long as you include it in the “Additional Non-Added Directories To Copy” group.
Project Settings -> Packaging (Under the Project header) -> Click the button to expand for advanced fields -> At the bottom click the + next to the field -> navigate to the ARToolkit folder
Image below, hope this helps!
