physxdebug switch viewport id to AzFramework::g_defaultSceneEntityDebugDisplayId (#1188)

Gems/PhysXDebug/Code/Source/SystemComponent.cpp

@@ -42,7 +42,7 @@ namespace PhysXDebug
     const float SystemComponent::m_maxCullingBoxSize = 150.0f;
     namespace Internal
     {
-        const AZ::Crc32 VewportId = 0; // was AzFramework::g_defaultSceneEntityDebugDisplayId but it didn't render to the viewport.
+        const AZ::Crc32 VewportId = AzFramework::g_defaultSceneEntityDebugDisplayId;
     }
 
     bool UseEditorPhysicsScene()