Don't call AddImageStringsToTable or MoveImageClassesToClassTable if running imageless

If we fail to create the image we use imageless running, this was
breaking AddImageStringsToTable since we didn't check for this
case. Added a check which avoids calling AddImageStringsToTable and
MoveImageClassesToClassTable if we don't have an image.

Bug: 18412472
Change-Id: I1dd8f306d5e41356a6b62fbd95315f564ee0d36e
2 files changed