Fix Layout issue

Fix Layout issue

 - All layouts should update all children position when their position is updated
   But it was done by EFL box
 - Some case, before child was added into Box(efl), Layout(Box) was moved.
   and child who didn't added into Box does not moved

 - Fixing
  * Remove overried UpdateLayout method on LayoutRenderer
  * Moved SetRenderer position after adding the children

 - Refactoring
  * Change IVisualElementRenderer interface
  * UpdateNativeGeometry was Changed to private
  * UpdateLayout was exposed as IVisualElementRenderer

Change-Id: I74bfdab00667bd6fa13cd8d392868af901b98dae