Expose the ability to control manipulator line bounds (#3890)

Signed-off-by: hultonha <hultonha@amazon.co.uk>

Code/Framework/AzManipulatorTestFramework/Include/AzManipulatorTestFramework/ViewportInteraction.h

@@ -40,11 +40,13 @@ namespace AzManipulatorTestFramework
         float DeviceScalingFactor() override;
     private:
         // ViewportInteractionRequestBus ...
-        bool GridSnappingEnabled();
-        float GridSize();
-        bool ShowGrid();
-        bool AngleSnappingEnabled();
-        float AngleStep();
+        bool GridSnappingEnabled() override;
+        float GridSize() override;
+        bool ShowGrid() override;
+        bool AngleSnappingEnabled() override;
+        float AngleStep() override;
+        float ManipulatorLineBoundWidth() override;
+
         AzFramework::ScreenPoint ViewportWorldToScreen(const AZ::Vector3& worldPosition);
     private:
         AZStd::unique_ptr<NullDebugDisplayRequests> m_nullDebugDisplayRequests;

Code/Framework/AzManipulatorTestFramework/Source/ViewportInteraction.cpp

@@ -62,6 +62,11 @@ namespace AzManipulatorTestFramework
         return m_angularStep;
     }
 
+    float ViewportInteraction::ManipulatorLineBoundWidth()
+    {
+        return 0.1f;
+    }
+
     AzFramework::ScreenPoint ViewportInteraction::ViewportWorldToScreen(const AZ::Vector3& worldPosition)
     {
         return AzFramework::WorldToScreen(worldPosition, m_cameraState);