Fix localization

mobile/src/main/res/menu/navigation.xml

@@ -19,7 +19,7 @@
     <item
         android:id="@+id/navigation_update"
         android:icon="@drawable/ic_action_update"
-        android:title="Update"
+        android:title="@string/title_update"
         android:visible="false"/>
 
 </menu>

mobile/src/main/res/values-zh-rCN/strings.xml

@@ -5,6 +5,7 @@
     <string name="title_tethering">共享管理</string>
     <string name="title_clients">已连设备</string>
     <string name="title_settings">设置选项</string>
+    <string name="title_update">更新应用</string>
 
     <string name="repeater_channel">无线中继 (%1$d MHz, 频道 %2$d)</string>
     <string name="repeater_wps">WPS（不安全）</string>

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

@@ -21,6 +21,7 @@
     <string name="title_tethering">Tethering</string>
     <string name="title_clients">Clients</string>
     <string name="title_settings">Settings</string>
+    <string name="title_update">Update</string>
 
     <string name="repeater_channel">Repeater (%1$d MHz, channel %2$d)</string>
     <string name="repeater_wps">WPS (insecure)</string>