message: core: use 251 as compid
  This is a workaround for now because we are conflicting with a component
  using MAV_COMP_ID_SYSTEM_CONTROL.
diff: @@ -26,7 +26,8 @@ class PluginImplBase;
  // Type that represents DroneCore client application which is a GCS.
  struct GCSClient {
  static constexpr uint8_t system_id = 0;
  - static constexpr uint8_t component_id = MAV_COMP_ID_SYSTEM_CONTROL;
  + // FIXME: This is a workaround for now. We should revert it later or add a compid for the SDK.
  + static constexpr uint8_t component_id = MAV_COMP_ID_SYSTEM_CONTROL + 1;
  static constexpr MAV_TYPE type = MAV_TYPE_GCS;
  };
  