fix NPE in SdkTypeUtils

[sullis]

Motivation and Context

fix a NullPointerException in SdkTypeUtils.java

Modifications

add logic to defend again null value

Testing

Screenshots (if appropriate)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

Checklist

• [ ] I have read the CONTRIBUTING document
• [ ] Local run of mvn install succeeds
• [ ] My code follows the code style of this project
• [ ] My change requires a change to the Javadoc documentation
• [ ] I have updated the Javadoc documentation accordingly
• [ ] I have added tests to cover my changes
• [ ] All new and existing tests passed
• [ ] I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• [ ] My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• [x] I confirm that this pull request can be released under the Apache 2 license

[sullis]

cc: @dagnir

[zoewangg]

Thank you @sullis! :)

Mind checking the box in the description to confirm can be released under the Apache 2 license?

I confirm that this pull request can be released under the Apache 2 license