Windows QPA: Add API for setting the application orientation preference.

Dynamically load the Win32 API functions for setting the rotation
preference and map this to static functions taking a
Qt::ScreenOrientation in QWindowsScreen.

Task-number: QTBUG-49541
Change-Id: I1c81cf6274d79a023a2ee755dd7c085ffd7cc015
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>