Improve bug detection

- Show a message with the appropriate error (network error)

app/src/main/java/org/schabi/newpipe/player/PopupVideoPlayer.java

@@ -818,6 +818,15 @@ public class PopupVideoPlayer extends Service implements StateInterface {
                         });
                     }
                 });
+            } catch (IOException ie) {
+                if (DEBUG) ie.printStackTrace();
+                mainHandler.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        Toast.makeText(PopupVideoPlayer.this, R.string.network_error, Toast.LENGTH_SHORT).show();
+                    }
+                });
+                stopSelf();
             } catch (Exception e) {
                 if (DEBUG) e.printStackTrace();
                 mainHandler.post(new Runnable() {