Reenable automatic screen resizes on SDL_RESIZABLE

Reenable automatic screen resizes on SDL_RESIZABLE

Reenable automatic screen resize events when creating SDL_RESIZABLE
video surface. Calling EpocSdlEnv::SetOrientation() was wrong, as it was
expecting upcoming HandleResourceChangeL() call, which isn't there due
to no real orientation change occuring and thus it was poisoning future
resize events. Just setting orientation is enough here.

Note that the behaviour is still faulty during external orientation
change inside the SDL_SetVideoMode() call, which can be reproduced by
creating fullscreen video surface, rotating the phone (accelerometer
required) and then creating resizable video surface.