Added default methods for involvement of ArrayList. (#319)

Author: ATATC

src/Device.h

@@ -8,17 +8,19 @@ template<typename T>
 class Device {
 protected:
     String _tag = "";
-    ArrayList<String> _parentTags = ArrayList<String>();
+    ArrayList<String> _parentTags = ArrayList<String>(0);
     ArrayList<int> _pins;
 
 public:
     explicit Device(const ArrayList<int> &pins) : _pins(pins) {}
+    Device() : Device(ArrayList<int>(0)) {}
     ~Device() = default;
     void tag(const String &tag) { _tag = tag; }
     String tag() { return _tag; }
     void parentTags(const ArrayList<String> &parentTags) { _parentTags = parentTags; }
     const ArrayList<String> &parentTags() { return _parentTags; }
     virtual void initialize(const ArrayList<String> &parentTags) { _parentTags = parentTags; }
+    void initializeTop() { initialize(ArrayList<String>(0)); }
     virtual T read() { return T(); }
     virtual void write(T payload) {}
     virtual void update(T data) {}