Start with all barcode images visible

If the user enters the barcode selector view with a pre-existing
id, the barcodes are immediately drawn. However, if the ImageViews
were invisible their initial size is not known, and as such the
generated barcode images are fuzzy or not as expected. To avoid this,
all images are set to be visible. The expectation is that once the
barcodes are drawn for the first time if they are invalid the images
will be made invisible anyway.

app/src/main/java/protect/card_locker/BarcodeSelectorActivity.java

@@ -144,7 +144,6 @@ public class BarcodeSelectorActivity extends AppCompatActivity
         }
 
         image.setImageBitmap(null);
-        image.setVisibility(View.GONE);
         image.setOnClickListener(new View.OnClickListener()
         {
             @Override