Merge "Fix "null" toast when FillCallback.onFailure(null) called."

                @Override

                public void onFailure(int requestId, CharSequence message) {

                    String errorMessage = message == null ? "" : String.valueOf(message);

                    fillRequest.completeExceptionally(

                            new RuntimeException(String.valueOf(message)));

                            new RuntimeException(errorMessage));

                }

            });

            return fillRequest;