DOCX drawingML shape import: no need to add TextFrames to the drawpage

As (not) done for the VML import in Drawing::createAndInsertXShape()
already.

Change-Id: Ib4eac941a46e09df6b5363e8c7eeacc2e6dbac6d
oox: avoid crash in ContextHandler2Helper::processCollectedChars()

Change-Id: Ie70c9914745364c7f2beb3cb84a610ec919a950c