title: Add coloured regions with MPAndroidChart
body: <p>I have been trying to add a coloured region to my chart. I found <a href="https://stackoverflow.com/questions/58283643/drawing-background-color-between-limit-lines">this</a> solution but I am finding problems to draw grid lines in the front as you can see in this image.
  <a href="https://i.stack.imgur.com/MvD4W.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MvD4W.jpg" alt="Chart example" /></a></p>
  <p>I have avoided xAxis grid lines by checkig for values but it's not a clean solution... I have seen old questions about this topic but maybe someone has an updated solution</p>