Made sure mocked test runtime is initialized with 60 Hz polling frequency by default.

Author: ekcoh

Packages/com.unity.inputsystem/Tests/TestFixture/InputTestRuntime.cs

@@ -359,7 +359,7 @@ public struct PairedUser
         public Action onShutdown { get; set; }
         public Action<bool> onPlayerFocusChanged { get; set; }
         public bool isPlayerFocused => m_HasFocus;
-        public float pollingFrequency { get; set; }
+        public float pollingFrequency { get; set; } = 60.0f; // At least 60 Hz by default
         public double currentTime { get; set; }
         public double currentTimeForFixedUpdate { get; set; }
         public float unscaledGameTime { get; set; } = 1;