Make the the devInfoTypesStrings.at(type) exception safe

Wrap it in a function to make it exception safe.

Change-Id: I29835993ae4fe2b7aa1a7027fab88c05ba89e6e3

rocm_smi/include/rocm_smi/rocm_smi_device.h

@@ -261,6 +261,7 @@ class Device {
     AMGpuMetricsPublicLatestTupl_t dev_copy_internal_to_external_metrics();
 
     static const std::map<DevInfoTypes, const char*> devInfoTypesStrings;
+    static const char* get_type_string(DevInfoTypes type);
 
  private:
     std::shared_ptr<Monitor> monitor_;