SystemUI: Fix keyguard clock/status and AOD layouts without smartspace

The keyguard clock layout is broken and overlaps the UDFPS icon on AOSP
because there's no smartspace view, and the KeyguardStatusArea isn't
accounted for correctly. Fix it by using the KeyguardStatusArea as the
smartspace view when there's no smartspace, so we follow the same code
paths and thus get the correct layout.

As a side effect, this also makes the status/smartspace position on the
AOD and big clock lock screen match that of Pixel stock.

Change-Id: Ic2cf0909f1b3c588ed4bf9cbae2dc78b40afa7b9