Implement getting/releasing HDC in Direct2D wxGraphicsContext

See #19207.

interface/wx/renderer.h

@@ -307,7 +307,7 @@ public:
     that were active before the call to this function are still in effect after it.
 
     @note Under wxMSW drawing on wxGCDC is possible only if it's associated with
-    GDI+ wxGraphicsContext.
+    GDI+ or Direct2D wxGraphicsContext.
 
     @library{wxcore}
     @category{gdi}