Fix segmentation fault on SSD tflite client destruction. (#7804)

* Fix segmentation fault on client destruction.

edgetpu::EdgeTpuContext needs to be created before tflite::Interpreter

research/lstm_object_detection/tflite/mobile_ssd_tflite_client.h

@@ -72,14 +72,14 @@ class MobileSSDTfLiteClient : public MobileSSDClient {
 
   virtual bool IsQuantizedModel() const;
 
-  std::unique_ptr<::tflite::FlatBufferModel> model_;
-  std::unique_ptr<::tflite::MutableOpResolver> resolver_;
-  std::unique_ptr<::tflite::Interpreter> interpreter_;
-
 #ifdef ENABLE_EDGETPU
   std::unique_ptr<edgetpu::EdgeTpuContext> edge_tpu_context_;
 #endif
 
+  std::unique_ptr<::tflite::FlatBufferModel> model_;
+  std::unique_ptr<::tflite::MutableOpResolver> resolver_;
+  std::unique_ptr<::tflite::Interpreter> interpreter_;
+
  private:
   // MobileSSDTfLiteClient is neither copyable nor movable.
   MobileSSDTfLiteClient(const MobileSSDTfLiteClient&) = delete;