Reorganized OutputDevice line functions - several of these functions
should be private. I have renamed the following functions:

* ImplInitLineColor -> InitLineColor (made this private)
* ImplPaintLineGeometryWithEvtlExpand -> PaintLineGeometryWithEvtlExpand
  (made this private)
* ImplTryDrawPolyLineDirect -> TryDrawPolyLineDirectNoAA (made this
  private)

I also made a small code change to make bTryAA more clear, and also
change (bTryAA && TryDrawPolyLineDirect(rPoly.getB2DPolygon()) to a
nestied if statement.

Change-Id: I90e8083d69b715912bf0ad1d400bc355f3501981