Fix AsyncTask to handle exceptions in doInBackground

        mWorker = new WorkerRunnable<Params, Result>() {

            public Result call() throws Exception {

                mTaskInvoked.set(true);

                Result result = null;

                try {

                    Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);

                    //noinspection unchecked

                Result result = doInBackground(mParams);

                    result = doInBackground(mParams);

                    Binder.flushPendingCommands();

                return postResult(result);

                } finally {

                    postResult(result);

                }

                return result;

            }

        };