SpecialUnusedimages: Use Config instead of globals

Change-Id: Iee9398ec8bc223b4833aa4055c32577cfc3227e1
SpecialUploadStash: Use Config instead of globals

Change-Id: I48a5838539b6aac822dd6806facbb1e8de204e4e
Merge "SpecialUnusedimages: Use Config instead of globals"
Merge "SpecialUploadStash: Use Config instead of globals"