Merge "IntResultReceiver: fix clearing on dispatch"

     * callback.

     */

    private static final class IntResultReceiver extends ResultReceiver {

        @NonNull

        @Nullable

        private IntConsumer mConsumer;

        @NonNull

        @Nullable

        private Executor mExecutor;

        IntResultReceiver(@NonNull Executor executor, @NonNull IntConsumer consumer) {

            super(null);

            Objects.requireNonNull(executor);

            Objects.requireNonNull(consumer);

            mExecutor = executor;

            mConsumer = consumer;

        }

        @Override

        protected void onReceiveResult(int resultCode, Bundle resultData) {

            if (mExecutor != null && mConsumer != null) {

                mExecutor.execute(() -> mConsumer.accept(resultCode));

                // provide callback only once.

                clear();

            }

        }

        private void clear() {

            final Executor executor;

            final IntConsumer consumer;

            synchronized (this) {

                executor = mExecutor;

                consumer = mConsumer;

                mExecutor = null;

                mConsumer = null;

            }

            if (executor != null && consumer != null) {

                executor.execute(() -> consumer.accept(resultCode));

            }

        }

    };

    /**