Ignore chmod if decky is not run as root (#510)

* Ignore chmod if decky is not run as root

* I can't read

* i managed to make a mistake on 2/3 lines i edited....

* add warning on startup

* logger.warn is depreciated

* Update localplatformlinux.py

backend/localplatformlinux.py

@@ -60,6 +60,8 @@ def chown(path : str,  user : UserType = UserType.HOST_USER, recursive : bool =
     return result == 0
 
 def chmod(path : str, permissions : int, recursive : bool = True) -> bool:
+    if _get_effective_user_id() != 0:
+        return True
     result = call(["chmod", "-R", str(permissions), path] if recursive else ["chmod", str(permissions), path])
     return result == 0
 
@@ -191,4 +193,4 @@ def get_unprivileged_user() -> str:
         logger.warn("Unprivileged user is not properly configured. Defaulting to 'deck'")
         user = 'deck'
 
-    return user
+    return user