Revert "Remove SSG timeout when SSG is complete"

This reverts commit ccbcf335.

Reason for revert: Potential culprit for b/305780625 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: If5f2d63140f58add543fb0a9a4ca8895a683be37