fix: send android pushes as data-only fcm messages

- include title and body in FCM data payload for Android

- use high priority Android config so the app builds notifications itself

app/notifications/tasks.py

@@ -80,18 +80,30 @@ def _send_fcm_to_user(user_id: int, title: str, body: str, data: dict[str, Any])
     if not tokens:
         return
 
-    string_data = {str(key): str(value) for key, value in data.items()}
+    string_data = {
+        **{str(key): str(value) for key, value in data.items()},
+        "title": title,
+        "body": body,
+    }
     for platform, token in tokens:
         webpush = None
+        notification = None
+        android = None
         if platform == "web":
             webpush = messaging.WebpushConfig(
                 fcm_options=messaging.WebpushFCMOptions(link=settings.firebase_webpush_link)
             )
+            notification = messaging.Notification(title=title, body=body)
+        elif platform == "android":
+            android = messaging.AndroidConfig(priority="high")
+        else:
+            notification = messaging.Notification(title=title, body=body)
         message = messaging.Message(
             token=token,
-            notification=messaging.Notification(title=title, body=body),
+            notification=notification,
             data=string_data,
             webpush=webpush,
+            android=android,
         )
         try:
             messaging.send(message, app=app)