Lockscreen : Hide clock for DeskClock

Hide statusbar clock if chronus or the DeskClock widgets
are being displayed

Patch-set 2: This will work also for Chronus
PatchSet 3 : Fixed compatibility with Chronus

Change-Id: Ife7db4521d349d221e48ac53b9d2d0a1ebaadce3
Lockscreen: remove mAppWidgetContainerHidden instead of hiding it

This will reduce memory usage.

Change-Id: I541ab53a98b84ce919998a322fa2b28a9621a9f9
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Revert "Only show camera widget to setup users."

This reverts commit 371f3408d6d9c3c3781d6e35e591f61026b42240.