There are two categories of preferences:
1. That are part of the default shared preference
They were all getting backed up and restored.
Added a blacklist to not restore some of these.
e.g. current account
2. That are in a non-default shared preference file.
These are not getting backed up currently, but added a specific
local preference file for all such preferences.
Bug: 17288591
Change-Id: I2f748be971a2337543e5014434aa39313fd1e1d8
