Screen rotates to portrait momentarily when exiting results screen in osu!mania mobile

[frenzibyte]

Initially reported in Discord. This is likely happening due to the exit flow going back to PlayerLoader before landing in song select. PlayerLoader.RequiresPortraitOrientation is set to follow Player.RequiresPortraitOrientation so that the screen remains in portrait when the user restarts gameplay. The logic for updating orientation should take into account screens which are not valid for resume (PlayerLoader in this case).