Migrate GeneratorFilters to IAthRNGSvc (part 2)

Moving to thread-safe random number service. Follows from !58299 (merged).

Tagging @ewelina, @cgutscho

Generators/GeneratorFilters/GeneratorFilters/M4MuIntervalFilter.h

 /*
-  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
 #ifndef GENERATORFILTERSM4MUINTERVALFILTER_H
 #define GENERATORFILTERSM4MUINTERVALFILTER_H
 
 #include "GeneratorModules/GenFilter.h"
+#include "GaudiKernel/ServiceHandle.h"
+#include "AthenaKernel/IAthRNGSvc.h"
 
-class IAtRndmGenSvc;
-
+namespace CLHEP {
+  class HepRandomEngine;
+}
 
 class M4MuIntervalFilter : public GenFilter {
 public:
@@ -20,10 +23,13 @@ public:
 
 private:
 
+  CLHEP::HepRandomEngine* getRandomEngine(const std::string& streamName,
+                                          const EventContext& ctx) const;
+
   double m_maxEta;
   double m_minPt;                           // Rapidity acceptance
 
-  ServiceHandle<IAtRndmGenSvc> m_rand;     // Random number generator
+  ServiceHandle<IAthRNGSvc> m_rndmSvc{this, "RndmSvc", "AthRNGSvc"};// Random number generator
 
   double m_prob2medium;
   double m_prob2low;