Print stack trace if the JSON could not be parsed

This helps to identify errors in the response.

Change-Id: Icda0919378ebf1deba3a4c7d6d6d010a09eed3ce

src/org/lineageos/updater/misc/Utils.java

@@ -136,7 +136,7 @@ public class Utils {
                     Log.d(TAG, "Ignoring incompatible update " + update.getName());
                 }
             } catch (JSONException e) {
-                Log.e(TAG, "Could not parse update object, index=" + i);
+                Log.e(TAG, "Could not parse update object, index=" + i, e);
             }
         }