Fix clocks layout on external displays

This uses the new version of the clock library layouts in the external displays presentation, which is based on adding all views to a constraint layout and adding a set of constraints.

A new set of constraints has been added here for the presentation, mostly based on the clock "preview" set but removing some margins

Bug: 415295016
Test: KeyguardDisplayManagerTest
Flag: com.android.systemui.enable_constraint_layout_lockscreen_on_external_display
Change-Id: Idf45b0e2725f92db9dbed34802311e9bd92f9305