How To Switch from Dalvik to ART Runtime on Nexus 7 2012 (and other devices) MANUALLY?

It's been a while the new ART Runtime has been released for various devices, unfortunately it's not available for all Android device...

Hide Soft Keys And Enlarge Your Display With Ultimate Dynamic Navbar

Apart from hardware keys, soft keys offers to modificate the layout, colors and cannot be damaged in any way (unless you damage the display)...