chore: mark native image checks as required (#498)

* chore: add native image checks as required

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Update sync-repo-settings.yaml

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: mpeddada1

java-dialogflow-cx/.github/sync-repo-settings.yaml

@@ -16,6 +16,8 @@ branchProtectionRules:
   - 'Kokoro - Test: Integration'
   - cla/google
   - OwlBot Post Processor
+  - 'Kokoro - Test: Java GraalVM Native Image'
+  - 'Kokoro - Test: Java 17 GraalVM Native Image'
 - pattern: java7
   isAdminEnforced: true
   requiredApprovingReviewCount: 1
@@ -37,4 +39,4 @@ permissionRules:
 - team: yoshi-java-admins
   permission: admin
 - team: yoshi-java
-  permission: push
+  permission: push