Allow to start/stop queue from download queue fragment. DownloadQueue now extends from ArrayList.

app/src/main/res/menu/download_queue.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item android:title="@string/action_start"
+          android:id="@+id/start_queue"
+          android:icon="@drawable/ic_play_arrow"
+          android:visible="false"
+          app:showAsAction="ifRoom"/>
+
+    <item android:title="@string/action_stop"
+          android:id="@+id/stop_queue"
+          android:icon="@drawable/ic_stop"
+          android:visible="false"
+          app:showAsAction="ifRoom"/>
+
+</menu>

app/src/main/res/values/strings.xml

@@ -24,6 +24,8 @@
     <string name="action_show_unread">Unread</string>
     <string name="action_show_downloaded">Downloaded</string>
     <string name="action_next_unread">Next unread</string>
+    <string name="action_start">Start</string>
+    <string name="action_stop">Stop</string>
 
     <!-- Buttons -->
     <string name="button_ok">OK</string>