Refactor: protected -> private

Author: prdoyle

libs/entitlement/src/main/java/org/elasticsearch/entitlement/runtime/policy/PolicyManager.java

@@ -101,9 +101,9 @@ public <E extends Entitlement> Stream<E> getEntitlements(Class<E> entitlementCla
 
     final Map<Module, ModuleEntitlements> moduleEntitlementsMap = new ConcurrentHashMap<>();
 
-    protected final Map<String, List<Entitlement>> serverEntitlements;
-    protected final List<Entitlement> apmAgentEntitlements;
-    protected final Map<String, Map<String, List<Entitlement>>> pluginsEntitlements;
+    private final Map<String, List<Entitlement>> serverEntitlements;
+    private final List<Entitlement> apmAgentEntitlements;
+    private final Map<String, Map<String, List<Entitlement>>> pluginsEntitlements;
     private final Function<Class<?>, String> pluginResolver;
 
     public static final String ALL_UNNAMED = "ALL-UNNAMED";