Track page-size preference coverage

Author: chen21019

scripts/check-ui-test-harness-blockers

@@ -51,8 +51,8 @@ if module_for_count != 0:
     fail("MODULE_FOR_USAGE_COUNT_UNEXPECTED", actual=module_for_count, expected=0)
 if module_for_component_count != 0:
     fail("MODULE_FOR_COMPONENT_USAGE_UNEXPECTED", actual=module_for_component_count, expected=0)
-if direct_qunit_import_count != 83:
-    fail("DIRECT_QUNIT_IMPORT_COUNT_UNEXPECTED", actual=direct_qunit_import_count, expected=83)
+if direct_qunit_import_count != 84:
+    fail("DIRECT_QUNIT_IMPORT_COUNT_UNEXPECTED", actual=direct_qunit_import_count, expected=84)
 
 volatile_computed_count = 0
 for path in Path("app").rglob("*.js"):
@@ -182,6 +182,7 @@ direct_qunit_tests = [
     Path("tests/unit/components/workspace-terminal-test.js"),
     Path("tests/unit/components/form-ports-test.js"),
     Path("tests/unit/components/new-container-port-preflight-test.js"),
+    Path("tests/unit/services/prefs-test.js"),
     Path("tests/unit/utils/socket-test.js"),
     Path("tests/unit/utils/owner-lookup-test.js"),
     Path("tests/unit/utils/catalog-question-answer-test.js"),