Gear VR + AssetBundles

Hi,

After a few searches I found nothing about my problem so I come here.
I would like to create an (simple) Android app without it being runned from Gear VR, with a button is using AssetBundles to import a Gear VR scene and only when the user click on this button, the application run Gear VR environment.

Anyone know how I can do this?
Thanks,

PS: I found this http://www.roadtovr.com/cardboard-enabler-opens-googles-vr-library-gear-vr-no-root-required/ but I have to download an other application to switch cardboard/gear vr so.... is not... the best way