Topology conversion to tree

This will allow the Settings App to change the absolute coordinates of
each display in the topology to a tree, which is the data structure used
by the DisplayManager API.

Flag: com.android.server.display.feature.flags.display_topology
Test: atest DisplayTopologyTest.kt
Bug: b/352648432
Change-Id: Ia4b71d6dc4d6bc4f709e98f15949beaeeaec15d6