update VisualFoodCollector model (#4773)

Cherry-pick #4769

Project/Assets/ML-Agents/Examples/FoodCollector/Prefabs/VisualFoodCollectorArea.prefab

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     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: da2da13ac266640339f1d87403c895f0, type: 3}
+  m_Model: {fileID: 11400000, guid: ec4b31b5d66ca4e51ae3ac41945facb2, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: VisualFoodCollector
     VectorActionDescriptions: []
     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: da2da13ac266640339f1d87403c895f0, type: 3}
+  m_Model: {fileID: 11400000, guid: ec4b31b5d66ca4e51ae3ac41945facb2, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: VisualFoodCollector
     VectorActionDescriptions: []
     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: da2da13ac266640339f1d87403c895f0, type: 3}
+  m_Model: {fileID: 11400000, guid: ec4b31b5d66ca4e51ae3ac41945facb2, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: VisualFoodCollector
     VectorActionDescriptions: []
     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: da2da13ac266640339f1d87403c895f0, type: 3}
+  m_Model: {fileID: 11400000, guid: ec4b31b5d66ca4e51ae3ac41945facb2, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: VisualFoodCollector

Project/Assets/ML-Agents/Examples/FoodCollector/TFModels/VisualFoodCollector.onnx.meta

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+guid: ec4b31b5d66ca4e51ae3ac41945facb2
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 683b6cb6d0a474744822c888b46772c9, type: 3}
+  optimizeModel: 1
+  forceArbitraryBatchSize: 1
+  treatErrorsAsWarnings: 0

Project/Assets/ML-Agents/Examples/FoodCollector/TFModels/VisualFoodCollector.nn.meta

-fileFormatVersion: 2
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-ScriptedImporter:
-  fileIDToRecycleName:
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-    11400002: model data
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
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-  script: {fileID: 11500000, guid: 19ed1486aa27d4903b34839f37b8f69f, type: 3}