Showing highlight clipping in LR Mobile Android?

I have LR Mobile v3. 4 on Android.

I cannot find a way to show highlight (&/or shadow) clipping on the screen when taking a photo, nor can I see how to get the histogram to show clipping when viewing / editing a photo.

The iOS version does the first of these.

This is quite important functionality - is it missing or have I just not found out how to do it?