Implement device type delete method in the mock implementation

components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/test/java/org/wso2/carbon/mdm/services/android/mocks/DeviceManagementProviderServiceMock.java

@@ -15,6 +15,23 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ *   Copyright (c) 2019, Entgra (pvt) Ltd. (http://entgra.io) All Rights Reserved.
+ *
+ *   Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
+ *   Version 2.0 (the "License"); you may not use this file except
+ *   in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing,
+ *   software distributed under the License is distributed on an
+ *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *   KIND, either express or implied. See the License for the
+ *   specific language governing permissions and limitations
+ *   under the License.
+ */
 
 package org.wso2.carbon.mdm.services.android.mocks;
 
@@ -661,6 +678,12 @@ public class DeviceManagementProviderServiceMock implements DeviceManagementProv
         return null;
     }
 
+    @Override
+    public boolean deleteDeviceType(String s, DeviceType deviceType)
+            throws DeviceManagementException {
+        return false;
+    }
+
     @Override
     public DeviceConfiguration getDeviceConfiguration(Map<String, String> propertyMap)
             throws DeviceManagementException, DeviceNotFoundException, UnauthorizedDeviceAccessException,