[atom_cpu_profiler_gem_promotion] added optional AZ::Interface usage to ProfilerImGuiRequests

Signed-off-by: AMZN-ScottR <24445312+AMZN-ScottR@users.noreply.github.com>

Gems/Profiler/Code/Include/Profiler/ProfilerImGuiBus.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <AzCore/EBus/EBus.h>
+#include <AzCore/Interface/Interface.h>
 
 namespace Profiler
 {
@@ -31,5 +32,6 @@ namespace Profiler
         static constexpr AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::Single;
     };
 
+    using ProfilerImGuiInterface = AZ::Interface<ProfilerImGuiRequests>;
     using ProfilerImGuiRequestBus = AZ::EBus<ProfilerImGuiRequests, ProfilerImGuiBusTraits>;
 } // namespace Profiler

Gems/Profiler/Code/Source/ProfilerImGuiSystemComponent.cpp

@@ -55,10 +55,22 @@ namespace Profiler
 
     ProfilerImGuiSystemComponent::ProfilerImGuiSystemComponent()
     {
+#if defined(IMGUI_ENABLED)
+        if (ProfilerImGuiInterface::Get() == nullptr)
+        {
+            ProfilerImGuiInterface::Register(this);
+        }
+#endif // defined(IMGUI_ENABLED)
     }
 
     ProfilerImGuiSystemComponent::~ProfilerImGuiSystemComponent()
     {
+#if defined(IMGUI_ENABLED)
+        if (ProfilerImGuiInterface::Get() == this)
+        {
+            ProfilerImGuiInterface::Unregister(this);
+        }
+#endif // defined(IMGUI_ENABLED)
     }
 
     void ProfilerImGuiSystemComponent::Activate()