AmbigousFilterRequest is only ever extracted, never created

Change-Id: I79c669c1635192199d6ef135e1ab9b48a9e7e63a
Resolves: #i125289# do apply possible changed <GraphicStreamURL>...

only for embedded images which already have its stream inside the package

fixes also issue 125290

(cherry picked from commit 9602a121b458e7456fc533dad86f434f846a72ba)

Conflicts:
	xmloff/source/draw/shapeexport2.cxx

Change-Id: I5af0093b20f2f291d3a94c690bfbdb59a59320c3