Problem is that the Android stuff is out of my realm of understanding since I have never used it. I can make some minor tweaks as follows but anything more will require someone with a detailed understanding.
This is missing from the source structure table on physics.
As you can see, it already explains only one version of physics can be used at a time. I can add this to the table.
Later on, in this same doc, it could be mentioned here.
Its not mentioned here, but I can add it.
I have this still awaiting implementation because I am not sure if it is complete as it was intended to replace https://wiki.jmonkeyengine.org/jme3/eclipse_jme3_android_jnindk.html.
The Android stuff really needs to be updated.