Application conversions from AglQt or other dependencies

• hvac

• mediaplayer

• navigation-demo

• launcher

Need to have their hard-coded window size removed to use that sent by the compositor. Additional logic will be required in the launcher case as it avoid any homescreen service, therefore it need the same interaction with afm-system-daemon as homescreen (for now at least). 

Further more any homescreen/windowmanager interaction should be taken out if not necessary. 

This should simplify thins quite a lot.