I’ve already tried to use OffscreenSurface render type and found that on Android JmeContext.Type parameter is ignored and jME alway starts in Type.Display mode. See: jmonkeyengine/JmeAndroidSystem.java at f8251c3443fbf4960c8fbb3c1ee85d8be3ff6f66 · jMonkeyEngine/jmonkeyengine · GitHub
We’ve discussed it here: [SOLVED] Unable to start app with offscreen rendering on Android