Add Centering animation for large clock

Also move splitshade logic to clock-level STL. The blueprint STL and the
clock STL were conflicting with each other and canceling out the
animation.

This does not include the stepping animation, but we should be able to
add it with this as the foundation.

Bug: 325301969
Flag: ACONFIG com.android.systemui.compose_lockscreen DEVELOPMENT
Test: switch between split shade and not splitshade and AOD to center
the clock.

Change-Id: I004b60275c35ccef07144ddbc97754f0527b799d