Fix localization issue

mobile/src/main/java/be/mygod/vpnhotspot/ServiceNotification.kt

@@ -20,7 +20,7 @@ object ServiceNotification {
         val builder = NotificationCompat.Builder(context, CHANNEL)
                 .setWhen(0)
                 .setColor(ContextCompat.getColor(context, R.color.colorPrimary))
-                .setContentTitle("VPN tethering active")
+                .setContentTitle(context.getText(R.string.notification_tethering_title))
                 .setSmallIcon(R.drawable.ic_device_wifi_tethering)
                 .setContentIntent(PendingIntent.getActivity(context, 0,
                         Intent(context, MainActivity::class.java), PendingIntent.FLAG_UPDATE_CURRENT))

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

@@ -52,6 +52,7 @@
     <string name="settings_misc_donate">捐款</string>
     <string name="settings_misc_donate_summary">请给我钱</string>
 
+    <string name="notification_tethering_title">VPN 共享已启用</string>
     <string name="notification_channel_tethering">VPN 共享服务</string>
     <plurals name="notification_connected_devices">
         <item quantity="other">%d 个设备已连接到 %s</item>

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

@@ -54,6 +54,7 @@
     <string name="settings_misc_donate">Donate</string>
     <string name="settings_misc_donate_summary">I love money</string>
 
+    <string name="notification_tethering_title">VPN tethering active</string>
     <string name="notification_channel_tethering">VPN Tethering Service</string>
     <plurals name="notification_connected_devices">
         <item quantity="one">%d device connected to %s</item>