Change main.py command from 'google' to 'certified'

Updated command in README for running main.py from 'google' to 'certified'.

README.md

@@ -65,7 +65,7 @@ Then launch waydroid with:
 
 After waydroid has finished booting, open terminal and switch to directory where "main.py" is located then run:
 
-    sudo python3 main.py google
+    sudo python3 main.py certified
 Copy the returned numeric ID, then open ["https://google.com/android/uncertified/?pli=1"](https://google.com/android/uncertified/?pli=1). Enter the ID and register it. Wait 10-20 minutes for device to get registered. Then clear Google Play Service's cache and try logging in!
 
 

tools/helper.py

@@ -40,7 +40,7 @@ def run(args: list, env: Optional[str] = None, ignore: Optional[str] = None):
     )
 
     # print(result.stdout.decode())
-    if result.returncode != 0 and result.stderr:
+    if result.stderr:
         error = result.stderr.decode("utf-8")
         if ignore and re.match(ignore, error):
             return result