Update notify.nfandroidtv.markdown (#4073)

source/_components/notify.nfandroidtv.markdown

@@ -14,9 +14,11 @@ ha_iot_class: "Local Polling"
 ---
 
 
-Notification platform for [Notifications for Android TV](https://play.google.com/store/apps/details?id=de.cyberdream.androidtv.notifications.google&hl=en) and [Notifications for FireTV](https://play.google.com/store/apps/details?id=de.cyberdream.firenotifications.google).
+Notification platform for [Notifications for Android TV](https://play.google.com/store/apps/details?id=de.cyberdream.androidtv.notifications.google) and [Notifications for FireTV](https://play.google.com/store/apps/details?id=de.cyberdream.firenotifications.google).
+
 The notifications are in the global scope of your Android TV device. They will be displayed regardless of which application is running.
-The In-App purchases only apply to the client for Android smartphones, so there isn't any limit when pushing notifications from Home Assistant.
+
+When setting this up be aware, that there are two apps: one for your smartphone to send notifications (not required for this platform) and one for your Android TV device to receive the notifications. The app available in the store of your target device is the one that is needed to display notifications sent from Home Assistant. The In-App purchases only apply to the client for Android smartphones, so there isn't any limit when pushing notifications from Home Assistant.
 
 To enable the notification platform, add the following to your `configuration.yaml` file:
 
@@ -37,6 +39,7 @@ Configuration variables:
 - **color** (*Optional*): Has to be one of: grey (default), black, indigo, green, red, cyan, teal, amber, pink
 - **transparency** (*Optional*): Has to be one of: 0%, 25% (default), 50%, 75%, 100%
 - **interrupt** (*Optional*): If set to true, 1, on etc., the notification is interactive and can be dismissed or selected to display more details. Depending on the running app (e.g. Netflix), this may stop playback.
+- **icon** (*Optional*): Change the default icon to a custom icon by providing the full path to a PNG image.
 
 The configuration will be used to configure the default values for the notification for the host specified by the IP. However, you can override most of the settings by passing them with the data-attribute when calling the service.
 This is a fully customized JSON you can use to test how the final notification will look like:
@@ -50,7 +53,8 @@ This is a fully customized JSON you can use to test how the final notification w
     "duration":2,
     "transparency":"0%",
     "color": "red",
-    "interrupt": 1
+    "interrupt": 1,
+    "icon": "/path/to/image.png"
     }
 }
 ```