This is a bit confusing as we have `self.lockscreen` which is the `LockScreen` object that is embedded into `GaiaTestCase`, and now we also have a LockScreen app too, which in this test we are storing in `self.lock_screen`. Is there a way to make this clearer? Maybe it would be better to have the lockscreen be a region of the system app? I know this was discussed earlier, but I don't think this issue of 2 lockscreen objects in different places was part of that discussion.