Revert^4 "Allow structural redefinition on non-final classes."

This reverts commit 664999a12d6fc8a8ef5c0519b12ec1e8a51bb085.

Fixed issues with GC and quickened instructions in parent CLs.

Reason for revert: Fixed issues with GC CHECK fail and device SEGVs.

Test: ./test.py --host
Test: ./test.py --target
Bug: 134162467
Bug: 144168550
Change-Id: Ibacddaf45beb72184f97d53d5d048bd442578658
diff --git a/runtime/runtime_callbacks.cc b/runtime/runtime_callbacks.cc
index ac73364..e0f57c0 100644
--- a/runtime/runtime_callbacks.cc
+++ b/runtime/runtime_callbacks.cc
@@ -228,6 +228,19 @@
   }
 }
 
+void RuntimeCallbacks::EndDefineClass() {
+  for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
+    cb->EndDefineClass();
+  }
+}
+
+void RuntimeCallbacks::BeginDefineClass() {
+  for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
+    cb->BeginDefineClass();
+  }
+}
+
+
 void RuntimeCallbacks::ClassPreDefine(const char* descriptor,
                                       Handle<mirror::Class> temp_class,
                                       Handle<mirror::ClassLoader> loader,