When using the `DrawingPlacementDepth::Stroke` or `DrawingPlacementDepth::Surface` the placement plane was not initialized. This leads to wrong projection values for tools that don't support either of these depth placements. This fixes the issue by initializing the placement plane in all cases except for `DrawingPlacementPlane::View` which will use the view plane. Pull Request: https://projects.blender.org/blender/blender/pulls/125284