Properly handle rotation in NotificationLockscreenPreference

There were some issues because we didn't explicitly
track and restore the selected position upon rotating,
so the fragment's oppinion of which item was selected
didn't match the ListView's.

Change-Id: Ia86e25dab36b44931297f8bcc7bcb7d6974f4b76
Fixes: 27921546
2 files changed