The DownloadIcon is reduced to a factory function that
returns an instance of Icon
Depends-On: I4d703eef68d51bbe0b03579c5cca0845e17b8c9d
Depends-On: I4a4129b2cac7c7c49559beef0b8780f3211edf9c
Bug: T205592
Change-Id: Ib87390d17bef6f50842f52cd84c9ce2b162aaff0