Update getBasicChangedGroups method to handle comparisons of subgroups.

Can now compare two DisplayInfo objects based on as subset of fields.

Bug: 435146856
Bug: 431149632
Flag: com.android.server.display.feature.flags.enable_logging_for_display_events
Test: atest DisplayInfoTest
Change-Id: I01fbab0321f5bc459335bb8cf8dfd3629dc068c9