chore: add native image checks as required (#983)

Author: mpeddada1

.github/sync-repo-settings.yaml

@@ -17,6 +17,8 @@ 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