Check if any hand is pinching or pressed in MRTK

IsAnyHandPressed

      private bool IsAnyHandPressed()
      {
          foreach (var controller in CoreServices.InputSystem.DetectedControllers)
          {
              if (controller is IMixedRealityHand)
              {
                  for (int i = 0; i < controller.Interactions.Length; i++)
                  {
                      if(controller.Interactions[i].InputType == DeviceInputType.Select)
                      {
                          return controller.Interactions[i].BoolData;
                      }
                  }
              }
          }
          return false;
      }