Update expectations to mark lib/mirrors/immutable_collection_test as failing.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index ae0a1d36f9714a34553a733f7676389d6ef9e7ca..6e283891f82f0e1170971c05f1e88dfd44682513 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -257,6 +257,8 @@ mirrors/symbol_validation_test: RuntimeError # Issue 13596
 
 async/timer_not_available_test: SkipByDesign # only meant to test when there is no way to implement timer (currently only in d8)
 
+mirrors/immutable_collections_test: Fail # Issue 17823
+
 [ $compiler == none && ( $runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 async/schedule_microtask6_test: Fail # Issue 10910
 mirrors/immutable_collections_test: Pass, Slow # Dartium debug uses -O0