Log public final method at warn level for non-interface case as well

Closes gh-33939

spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java

@@ -289,10 +289,16 @@ class CglibAopProxy implements AopProxy, Serializable {
 				int mod = method.getModifiers();
 				if (!Modifier.isStatic(mod) && !Modifier.isPrivate(mod)) {
 					if (Modifier.isFinal(mod)) {
-						if (logger.isWarnEnabled() && implementsInterface(method, ifcs)) {
+						if (logger.isWarnEnabled() && Modifier.isPublic(mod)) {
+							if (implementsInterface(method, ifcs)) {
 								logger.warn("Unable to proxy interface-implementing method [" + method + "] because " +
 										"it is marked as final, consider using interface-based JDK proxies instead.");
 							}
+							else {
+								logger.warn("Public final method [" + method + "] cannot get proxied via CGLIB, " +
+										"consider removing the final marker or using interface-based JDK proxies.");
+							}
+						}
 						if (logger.isDebugEnabled()) {
 							logger.debug("Final method [" + method + "] cannot get proxied via CGLIB: " +
 									"Calls to this method will NOT be routed to the target instance and " +