Made MockSyncthingService a complete stub of SyncthingService.

Now all methods are overriden, and throw UnsupportedOperationException
unless used by a test.

src/androidTest/java/com/nutomic/syncthingandroid/test/MockSyncthingService.java

@@ -1,5 +1,10 @@
 package com.nutomic.syncthingandroid.test;
 
+import android.app.Activity;
+import android.content.Intent;
+import android.os.IBinder;
+
+import com.nutomic.syncthingandroid.syncthing.RestApi;
 import com.nutomic.syncthingandroid.syncthing.SyncthingService;
 
 import java.util.LinkedList;
@@ -9,6 +14,46 @@ public class MockSyncthingService extends SyncthingService {
 
     private LinkedList<OnApiChangeListener> mOnApiChangedListeners = new LinkedList<>();
 
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateState() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void onCreate() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void onDestroy() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void registerOnWebGuiAvailableListener(OnWebGuiAvailableListener listener) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isFirstStart() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public RestApi getApi() {
+        throw new UnsupportedOperationException();
+    }
+
     @Override
     public void registerOnApiChangeListener(OnApiChangeListener listener) {
         mOnApiChangedListeners.add(listener);
@@ -23,4 +68,9 @@ public class MockSyncthingService extends SyncthingService {
         return false;
     }
 
+    @Override
+    public String getWebGuiUrl() {
+        throw new UnsupportedOperationException();
+    }
+
 }