Android: Add rumble for phone

This currently only supports using the internal vibrate on a phone for rumble.

Source/Core/InputCommon/ControllerInterface/Android/Android.h

@@ -41,6 +41,19 @@ private:
     const ButtonManager::ButtonType _index;
     const float _neg;
   };
+  class Motor : public Core::Device::Output
+  {
+  public:
+    Motor(int padID, ButtonManager::ButtonType index) : _padID(padID), _index(index) {}
+    ~Motor();
+    std::string GetName() const override;
+    void SetState(ControlState state) override;
+
+  private:
+    const int _padID;
+    const ButtonManager::ButtonType _index;
+    static void Rumble(int padID, double state);
+  };
 
 public:
   Touchscreen(int padID);