I saw some examples where an 'Android device's thing was used, but I do not see such a thing in the list of selectable things. Where do I find this?
There is no android device Thing. We don't offer any control over your phone.
I think what I was looking at was IFTTT...they do have an option to control phone. I should be able to trigger that using stringify
Yup. You can do that using the IFTTT thing in Stringify.