code: public static String getQualifiers(Configuration configuration, DisplayMetrics displayMetrics) {
      return ConfigurationV25.resourceQualifierString(configuration, displayMetrics);
    }
docs: Returns a qualifier string describing the given configuration and display metrics.
  
  @param configuration the configuration.
  @param displayMetrics the display metrics.
  @return a qualifier string as described (https://developer.android.com/guide/topics/resources/providing-resources.html#QualifierRules)[here].