Fix adding displays to topology

- display should be internal, external or overlay
- if internal, it has to be the default display
- if external or overlay, extended displays need to be enabled
- display should be in default display group

Bug: 384013689
Test: DisplayManagerServiceTest, DisplayTopologyCoordinatorTest
Flag: com.android.server.display.feature.flags.display_topology
Change-Id: I05250c7a3a91bb0df54c17f5fa9db2860963549b