Camera: Update storage hint in full screen state change listener.

When user swipe from gallery to camera, storage hint was not updated
based on the latest storage space. This change will call update storage
hint in full screen state change listener callback.

Change-Id: I9950cb165ae49a7d062c012f24e63898045d0c6c
CRs-fixed: 522710
Merge "Camera: Update storage hint in full screen state change listener." into jb4.3