Enable Style/EmptyLinesAroundAccessModifier rubocop cop

See #17478

.rubocop.yml

@@ -194,7 +194,7 @@ Style/EmptyLines:
 # Keep blank lines around access modifiers.
 Style/EmptyLinesAroundAccessModifier:
-  Enabled: false
+  Enabled: true
 # Keeps track of empty lines around block bodies.
 Style/EmptyLinesAroundBlockBody:

app/services/oauth2/access_token_validation_service.rb

@@ -22,6 +22,7 @@ module Oauth2::AccessTokenValidationService
     end
     protected
+
     # True if the token's scope is a superset of required scopes,
     # or the required scopes is empty.
     def sufficient_scope?(token, scopes)

lib/gitlab/ldap/config.rb

@@ -93,6 +93,7 @@ module Gitlab
       end
       protected
+
       def base_config
         Gitlab.config.ldap
       end