Fix settings crash in print job screen.

The code was looking up the print job from the print manager
based on the lifecycle event of the hosting fragment. There
was a case missing and the print job not initialized on
rotation. This change looks up the job lazily making the
code more robust.

bug:17471952

Change-Id: I00075e161f69ca711bac6857f5ec00c20b5b17a0