Bump org.apache.maven.plugins:maven-javadoc-plugin in /java (#3124)

Bumps [org.apache.maven.plugins:maven-javadoc-plugin](https://github.com/apache/maven-javadoc-plugin) from 2.7 to 3.5.0.
- [Release notes](https://github.com/apache/maven-javadoc-plugin/releases)
- [Commits](https://github.com/apache/maven-javadoc-plugin/compare/maven-javadoc-plugin-2.7...maven-javadoc-plugin-3.5.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-javadoc-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mandlil <138015259+mandlil@users.noreply.github.com>

java/demo/pom.xml

@@ -164,7 +164,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.4.1</version>
+        <version>3.5.0</version>
         <configuration>
           <!-- SoyInfoParser does not generate valid javadoc and
           <excludePackageNames> does not work for /generated-sources for

java/pom.xml

@@ -138,7 +138,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>2.7</version>
+        <version>3.5.0</version>
         <executions>
           <execution>
             <id>attach-javadocs</id>