message: Fix memory leaks in TpuTransferManager by calling ApiConverter::Free
diff: @@ -93,6 +93,8 @@ Status TpuTransferManager::TransferLiteralToInfeed(
  tpu::ExecutorApiFn()->TpuTransferManager_TransferLiteralToInfeedFn(
  manager_, tpu_executor->se_executor(), &c_literal, status.c_status);
  + ApiConverter::Free(&c_literal);
  +
  return status.status();
  }
  @@ -135,6 +137,9 @@ Status TpuTransferManager::TransferLiteralFromOutfeed(
  manager_, tpu_executor->se_executor(), &c_shape, &c_literal,
  status.c_status);
  + ApiConverter::Free(&c_shape);
  + ApiConverter::Free(&c_literal);
  +
  return status.status();
  }
  @@ -265,6 +270,7 @@ Status TpuTransferManager::LinearizeToBuffers(
  tpu::ExecutorApiFn()->TpuTransferManager_FreeBuffersFn(
  buffers_array, buffers_size, buffers_array_size);
  + ApiConverter::Free(&c_literal);
  return status.status();
  }
  