Keep Volley from leaking requests between activities and add a forgotten license notice.

app/src/main/java/com/keylesspalace/tusky/ReportActivity.java

@@ -49,7 +49,7 @@ import java.util.List;
 import java.util.Map;
 
 public class ReportActivity extends BaseActivity {
-    private static final String TAG = "ReportActivity"; // Volley request tag
+    private static final String TAG = "ReportActivity"; // logging tag and Volley request tag
 
     private String domain;
     private String accessToken;
@@ -117,6 +117,12 @@ public class ReportActivity extends BaseActivity {
         fetchRecentStatuses(accountId);
     }
 
+    @Override
+    protected void onDestroy() {
+        VolleySingleton.getInstance(this).cancelAll(TAG);
+        super.onDestroy();
+    }
+
     /* JSONArray has a constructor to take primitive arrays but it's restricted to API level 19 and
          * above, so this is an alternative. */
     private static JSONArray makeStringArrayCompat(String[] stringArray) throws JSONException {

app/src/main/java/com/keylesspalace/tusky/ReportAdapter.java

@@ -1,3 +1,18 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is part of Tusky.
+ *
+ * Tusky is free software: you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky. If not, see
+ * <http://www.gnu.org/licenses/>. */
+
 package com.keylesspalace.tusky;
 
 import android.support.v7.widget.RecyclerView;