[FIX] TableHelper: avoid density aware images in mobile scenario

The property "densityAware" on sap.m.Image modifies the src of the image. This needs to be avoided in case of the Table control since the images are not density aware. Otherwise the images like sort and filter on the Table column will not be found.

Change-Id: I6291135766f2f6e7bad4cc8a30fca249f2e46fc2
CR-Id: 012006153200015733052014