Add wrap hints for vtkPoints2D and vtkRenderWindow.

This includes hints for GetPosition(), GetSize(), and GetScreenSize()
for all concrete RenderWindow classes as insurance, even though not
all of these classes define those methods yet.

Change-Id: I6d85df74edcb90f3a728d67c5f6055689f4280e9
Merge topic '14882_add_wrapping_hints' into master

0541472e Add wrap hints for vtkPoints2D and vtkRenderWindow.