SF: LayerSnapshotBuilder updates

- Adds support for framerate, gamemode, transformhint & input
- Fixes z-order traversal bug where a layer was visited twice.
- Compat fix, a layer cannot be root once its parented

Test: presubmit
Bug: 238781169
Change-Id: Ic33aa09b2c41fadd4872ca481b41f86400629fc8
diff --git a/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
index 08727f2..1a82232 100644
--- a/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
+++ b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
@@ -245,6 +245,18 @@
         mLifecycleManager.applyTransactions(transactions);
     }
 
+    void setLayerStack(uint32_t id, int32_t layerStack) {
+        std::vector<TransactionState> transactions;
+        transactions.emplace_back();
+        transactions.back().states.push_back({});
+
+        transactions.back().states.front().state.what = layer_state_t::eLayerStackChanged;
+        transactions.back().states.front().state.surface = mHandles[id];
+        transactions.back().states.front().state.layerId = static_cast<int32_t>(id);
+        transactions.back().states.front().state.layerStack = ui::LayerStack::fromValue(layerStack);
+        mLifecycleManager.applyTransactions(transactions);
+    }
+
     LayerLifecycleManager mLifecycleManager;
     std::unordered_map<uint32_t, sp<LayerHandle>> mHandles;
 };