With current EMF+ implementation all filled figures,
does not support transparency.
This patch add transparency support for following EMF+ records:
- DrawDriverString
- DrawString
- FillEllipse
- FillRects
- FillPolygon
- FillPie
- FillPath
- FillRegion

Change-Id: I1e59ea90bdf5fafc07ff9417fccace44872bbecd
Reviewed-on: https://gerrit.libreoffice.org/50609Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>