Bug 1098667 - Pre: Fix imports.
Bug 1098667 - Part 1: Add MigratedFromSync11 Firefox Account State on Android.
Bug 1098667 - Part 2: Add Action.NeedsFinishMigrating.
Bug 1098667 - Part 3: Customize "Upgrade required" notification.
Bug 1098667 - Part 4: Add FinishMigrating Activity.
Bug 1098667 - Part 5: Show "Upgrade finished" screen.
Bug 1098667 - Add MigratedFromSync11 Firefox Account State. r=rnewman