Notifications on FireTV devices also do not appear as a pop-up on the screen - you need to go to the system menu and select the "Notifications" option to see them.
I'm guessing this is by design on the TV versions of android so they won't be intrusive.
If you want the user to see a message, then try using a toast message.
1) What app is associated with that "(1)" that you are pointing to - meaning what app is making that "1" be displayed?
2) What app is in the foreground in that screenshot you posted (meaning were you at the home screen of the device or were you in another app, and if so, what is that other apps name?)
1) What app is associated with that "(1)" that you are pointing to - meaning what app is making that "1" be displayed?
2) What app is in the foreground in that screenshot you posted (meaning were you at the home screen of the device or were you in another app, and if so, what is that other apps name?)