Revert^4 "Walk internal ArtField/ArtMethod pointers"

Several of the new tests make use of the invoke-custom opcode. This
opcode is not supported by dexter/slicer causing the tests to fail.

This reverts commit c34eab45161c51bf63e548e44645cbcc59d01268.

Reason for revert: Added tests to redefine-stress known failures
Test: ./test.py --host --redefine-stress
Bug: 134162467

Change-Id: Ic1b375a0cb1e44d0252c17115af92c269fb8efc5
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index 8f68b55..0c9aece 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -2198,6 +2198,7 @@
 }
 
 void Runtime::VisitReflectiveTargets(ReflectiveValueVisitor *visitor) {
+  thread_list_->VisitReflectiveTargets(visitor);
   heap_->VisitReflectiveTargets(visitor);
   jni_id_manager_->VisitReflectiveTargets(visitor);
   callbacks_->VisitReflectiveTargets(visitor);