I have shipped two small projects using Godot 3. It's a cool engine but to me it can improve on the following points to be considered a mature engine for a new indie project:
* GDscript is cool but lacks features such as better typing and lambdas over generic nodes.
* I have encountered many bugs in the Engine more than when I was using GameMaker.
* It lacks native mobile monetization.
Other than that I'm much more enjoying working with Godot than Unity.
I have the exact same issue with mine. As a workaround I set a password to install apps from the play store and it works, she never download new apps so it's not an issue.
Other than that I'm much more enjoying working with Godot than Unity.