message: [tflite] nnapi delegate max_delegated_partitions=0
  make it possible to specify `max_delegated_partitions=0`. In the
  original code, when `--max_delegated_partitions=0` (or less than 0)
  is specified, it's ignored. That is, the maximum number of
  partitions is set to 3 (nnapi delegate's default number).
diff: @@ -140,7 +140,7 @@ TfLiteDelegatePtr NnapiDelegateProvider::CreateTfLiteDelegate(
  options.execution_preference = execution_preference;
  }
  int max_delegated_partitions = params.Get<int>("max_delegated_partitions");
  - if (max_delegated_partitions > 0) {
  + if (max_delegated_partitions >= 0) {
  options.max_number_delegated_partitions = max_delegated_partitions;
  }
  delegate = evaluation::CreateNNAPIDelegate(options);
  