Fixed an issue where the keyguard statusbar was faded

Because the fadeout was dependent on the location of
the notification, the statusbar would be faded by default.
Now, the fading is only depending on the expandedHeight instead.

Bug: 134952761
Test: enable bypass, see no faded keyguard statusbar
Change-Id: I9c0fa0efea3fed8cc2899cc3f24f70c1bf4f7a8a