What is this symbol in my notifications?

[AC Question]

Green android robot's head and shoulders, white eyes, no arms in medium blue circle with no text

 

[belodion]

What do you see if you swipe down from the top of the screen?

 

[Clyph Stole]

 

[Golfdriver97]

Usually that's an OS notification. What happens if you click on it?

 

[Clyph Stole]

Nothing. It has now disappeared on its own.