Icon was created using Android Asset Studio: https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html#foreground.type=image&foreground.space.trim=0&foreground.space.pad=0&foreColor=607d8b%2C0&crop=0&backgroundShape=square&backColor=fff%2C100&effects=none
From this clipart: https://openclipart.org/detail/30403/tango-go-up Which is public domain.