Device specific drawing has been moved to its own function.
VirtualDevice and Window draw in the same way, so can be shared in
OutputDevice, however Printer has its only specific ways of drawing
so it needs its own method.

Change-Id: I051fee029a1ec022a131bb12588189178c4109b2
Reviewed-on: https://gerrit.libreoffice.org/8724Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Tested-by: Chris Sherlock <chris.sherlock79@gmail.com>