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

Bug: 17464068
Bug: 17464805
Change-Id: I533ae8821e0628fdf6591538a96ab50f805c0cdf

Also cleanup the manifest to group similar components together.
Moving LoginAccountUtils to its own package

Bug: 17464068
Change-Id: Iad7928855531d58334b1e4039bb45b97dde75462