Storage configuration options (2/2)

This adds an intent listener to listen for storage path changes
from the camera app, so that it will display the correct folder
as the main Camera folder.

Change-Id: Ie487323edce58f174b4956a2e832ac4c121309ef
Merge "Storage configuration options (2/2)" into cm-11.0
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_packages_apps_Gallery2 into cm-11.0