InfiniTime moved the LVGL-FS driver initialization to the LittleVgl
constructor and passed the FS member to do that.
Update the simulator copy of LittleVgl to do just that.
Fixes: https://github.com/InfiniTimeOrg/InfiniSim/issues/89
InfiniTime removed the `Pinetime::Drivers::Cst816S& touchPanel`
reference from the LittleVGL constructor. Update that in the simulator
to stay compatible