There is a notification that is always visible from GmsCompat which says "Sandboxed Google Play is running". Is there a way to hide this? When I tap the notification it takes me to the Sandboxed Google Play options area but I don't see any settings regarding notifications here.
Just long press on the notification and toggle it there
Settings > Notifications > App Settings > Enable "Show System" in the three dots in the top right corner > GmsCompat > Toggle "Sandboxed Google Play is running"