Adding Copyright to file

Change-Id: Id2f02e5e7733512932197d90f7d3c3f914e28b69

Author: florina-muntenescu

app/src/main/java/com/example/android/codelabs/paging/model/RepoSearchResult.kt

@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed 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 com.example.android.codelabs.paging.model
 
 import android.arch.lifecycle.LiveData