message: Add internal uint b stats to TfOpStats.
diff: @@ -245,4 +245,6 @@ message TfOpStats {
  optional HostOpsResult host_ops = 8;
  // A map from core ID to name.
  map<uint32, string> core_id_to_name_map = 9;
  + // The result for hw unit b stats.
  + optional bytes unit_b_stats = 10;
  }
  