ris: Scan edittext now clears on entry (as it will have to on a process), and removes the virtual keyboard if it was visible

ris: Removed OK button from barcode scan fragment because it was redundant; enter serves the same purpose

ris: Refactored to use a common scan fragment for the barcode scan input; refactored to support material design guidelines

lc-conflux-engine: Added this stub module

lc-gnusto: Added the module for 2.0