Show dot on keyguard but not with QS expanded

Unfortunately we just have to put a strong reference to the privacy dot
view controller from the notification panel since there is no great way
of knowing whether or not QS is expanded.

Also reverted using the RotationUtils constants since they differ from
the device rotation constants. We should probably fix that...

Test: manual
Fixes: 187659664
Change-Id: Ib1f802850948436925c52261ebe5afc6b52167ee