fix(mobile): logout on upgrade (#26827)

* use cookiejar

* cookie duping hook

* remove old pref

* handle network switching on logout

* remove bootstrapCookies

* dead code

* fix cast

* use constants

* use new event name

* update api

mobile/lib/repositories/auth.repository.dart

@@ -38,10 +38,6 @@ class AuthRepository extends DatabaseRepository {
     });
   }
 
-  String getAccessToken() {
-    return Store.get(StoreKey.accessToken);
-  }
-
   bool getEndpointSwitchingFeature() {
     return Store.tryGet(StoreKey.autoEndpointSwitching) ?? false;
   }