Catch case where barcode rendering runs into an OOM

There are still cases where the barcode could not be rendered
because the process runs out of its memory limit. To avoid
a crash, catch the failure and log it. The barcode will
not be displayed, but at least the app will not crash.

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

@@ -149,6 +149,12 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
         {
             Log.e(TAG, "Failed to generate barcode of type " + format + ": " + cardId, e);
         }
+        catch(OutOfMemoryError e)
+        {
+            Log.w(TAG, "Insufficient memory to render barcode, "
+                + imageWidth + "x" + imageHeight + ", " + format.name()
+                + ", length=" + cardId.length(), e);
+        }
 
         return null;
     }