vendor_slim: add NovaLauncher and cleanup and push build.5.PCFR

after a lot memory usage tests with different launcher
nova was clear the winner, especialy the more you
add on the launcher

delete HoloLauncherHD as well the Velvet.apk we do not use

Pre code freeze for build.5

nice work guys

cheers

Change-Id: I655796ac41f1e0e79b0e9ed7420bf251ec43d33e