In order to reduce the UI initialization code, move
let EmailProvider restore accounts when it opens the DB.
Backup can be moved too, but I just leave it as a TODO.
Change-Id: Id5c1810904db6abaecbfecbaa8d2d53834ebf07b
* Use EmailProvider to backup/restore into a backup database
* Remove all of the old AccountBackupRestore code
* Get rid of the legacy Account class and all of the Preferences
crap that referenced it
* Remove corresponding tests
Change-Id: I2de75aafdacc87246174303961e58547303f641e
Jorge Ruesga