MINOR: Tidy javadoc packages (#20936)

Sorted the names of the packages for which javadoc is generated. Removed
`org/apache/kafka/common/security/oauthbearer/secured` which no longer
exists.

Reviewers: Lianet Magrans <[email protected]>

Author: AndrewJSchofield

build.gradle

@@ -2008,21 +2008,20 @@ project(':clients') {
     include "**/org/apache/kafka/common/*"
     include "**/org/apache/kafka/common/acl/*"
     include "**/org/apache/kafka/common/annotation/*"
+    include "**/org/apache/kafka/common/config/*"
+    include "**/org/apache/kafka/common/config/provider/*"
     include "**/org/apache/kafka/common/errors/*"
     include "**/org/apache/kafka/common/header/*"
     include "**/org/apache/kafka/common/metrics/*"
     include "**/org/apache/kafka/common/metrics/stats/*"
     include "**/org/apache/kafka/common/quota/*"
     include "**/org/apache/kafka/common/resource/*"
-    include "**/org/apache/kafka/common/serialization/*"
-    include "**/org/apache/kafka/common/config/*"
-    include "**/org/apache/kafka/common/config/provider/*"
     include "**/org/apache/kafka/common/security/auth/*"
+    include "**/org/apache/kafka/common/security/oauthbearer/*"
     include "**/org/apache/kafka/common/security/plain/*"
     include "**/org/apache/kafka/common/security/scram/*"
     include "**/org/apache/kafka/common/security/token/delegation/*"
-    include "**/org/apache/kafka/common/security/oauthbearer/*"
-    include "**/org/apache/kafka/common/security/oauthbearer/secured/*"
+    include "**/org/apache/kafka/common/serialization/*"
     include "**/org/apache/kafka/server/authorizer/*"
     include "**/org/apache/kafka/server/policy/*"
     include "**/org/apache/kafka/server/quota/*"