FbxImportRequestHandler is now loaded only once per AssetBuilder and Editor + re-enabled STL support (#933)

* Revert "FBX settings can be opened again: g_fbxImporter is set, and if the ex… (#878)"

This reverts commit 58adcf168f.

* Revert "Merge pull request #753 from aws-lumberyard-dev/Helios_DataDrivenAssetImporter"

This reverts commit 798d96f1a2, reversing
changes made to eb31d90ad9.

* Revert "Revert "Merge pull request #753 from aws-lumberyard-dev/Helios_DataDrivenAssetImporter""

This reverts commit c1124f26d957388e88cc4990021314b5af247e1d.

* Revert "Revert "FBX settings can be opened again: g_fbxImporter is set, and if the ex… (#878)""

This reverts commit 978477097892a22e83519646527ff52ba6532f35.

* Fixed how FbxImportRequestHandler is loaded

* Bumped version to force FBX to rebuild + removed unused variable

* Revert "Revert "FBX settings can be opened again: g_fbxImporter is set, and if the ex… (#878)""

This reverts commit 978477097892a22e83519646527ff52ba6532f35.

* Revert "Revert "Merge pull request #753 from aws-lumberyard-dev/Helios_DataDrivenAssetImporter""

This reverts commit c1124f26d957388e88cc4990021314b5af247e1d.

* Fixed a bad revert

* Better error reporting at AP launch

* AZ_CRC -> AZ_CRC_CE and removed delayed reload of settings registry file now that it's available at startup

* fixed typo in comment

Gems/SceneProcessing/Code/Source/SceneBuilder/SceneBuilderComponent.cpp

@@ -72,6 +72,11 @@ namespace SceneBuilder
         m_sceneBuilder.BusDisconnect();
     }
 
+    void BuilderPluginComponent::GetRequiredServices(AZ::ComponentDescriptor::DependencyArrayType& required)
+    {
+        required.emplace_back(AZ_CRC_CE("AssetImportRequestHandler"));
+    }
+
     void BuilderPluginComponent::Reflect(AZ::ReflectContext* context)
     {
         AZ::SerializeContext* serializeContext = azrtti_cast<AZ::SerializeContext*>(context);
@@ -81,5 +86,4 @@ namespace SceneBuilder
                 ->Attribute(AZ::Edit::Attributes::SystemComponentTags, AZStd::vector<AZ::Crc32>({ AssetBuilderSDK::ComponentTags::AssetBuilder }));
         }
     }
-
 } // namespace SceneBuilder