After lots of trying i finally found a solid way to convert your Fusion 2.5 window frame (that little area where everything is happening) to an android device without losing the quality in your graphics!
To do that, simply go to your workspace toolbar, select your mfa and go to the properties window. There, you change the build type to "Android / OUYA application". Then, you go to the second tab (the little monitor icon) and uncheck every box that is checked. (this will remove all bars and things you dont want to see leaving only your game on the screen)
Sidenote to that^ : my game is vertical 250x400, if you have another resolution you might want to change some settings!
After that, you click on the Android Robot icon and uncheck smooth resizing. This thing will adjust your frame window but make your pixels blurry, which is not cool if you do a retro game for example. And now the final step: just above "smooth resizing, change "Display" to --> Stretch to fill. This will adjust your window frame to your android display size without losing quality.
Hope i could help some people with this!