Add empty icon if no network speed

app/src/main/java/com/mridang/speedo/TrafficService.java

@@ -337,8 +337,8 @@ public class TrafficService extends Service {
             try {
 
                 if (lngSpeed < 1024) {
-                    TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000);
+                    TrafficService.notBuilder.setSmallIcon(R.drawable.empty);
-                    updateIcon(R.drawable.wkb000);
+                    updateIcon(R.drawable.empty);
                 } else if (lngSpeed < 1048576L) {
 
                     TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000 + (int) (lngSpeed / 1024L));
@@ -394,7 +394,7 @@ public class TrafficService extends Service {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             CharSequence name = getString(R.string.channel_name);
             String description = getString(R.string.channel_description);
-            int importance = NotificationManager.IMPORTANCE_DEFAULT;
+            int importance = NotificationManager.IMPORTANCE_LOW;
             NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
             channel.setDescription(description);
             // Register the channel with the system. You can't change the importance