privacy guard fix NPE

If the user flash a data app over recovery on clean flash
(like a lot themed apps or gapps packages are doing)
the user will get into a bootloop because of an NPE
due an unknown state of the user due that
installedUser == null

To fix it
Check if installUser exists if yes then
call the provider settings value for the current
user

PatchSet 2+3: message update
	      fix for real now

Change-Id: Ie5f94a0d0a11ae24fdfdc8372c0433b26793b66e