message: change ordinal selector interface
diff: @@ -24,7 +24,7 @@ namespace tpu {
  class TPUOrdinalSelectorInterface {
  public:
  virtual ~TPUOrdinalSelectorInterface() = default;
  - virtual int64 GetOrdinal(int64_t* req_id) = 0;
  + virtual int64 GetOrdinal(absl::optional<uint64> key, int64_t* req_id) = 0;
  virtual void DequeueFromCoreSelector(int32_t device_ordinal,
  int64_t req_id) = 0;
  };
  