Update generated analyzer_experimental for new List interface.

pkg/analyzer_experimental/lib/src/generated/java_core.dart

Index: pkg/analyzer_experimental/lib/src/generated/java_core.dart
diff --git a/pkg/analyzer_experimental/lib/src/generated/java_core.dart b/pkg/analyzer_experimental/lib/src/generated/java_core.dart
index 3f6cc5aaf0a9f129305014dc15eafcf21561011e..1170ca179a2cf404fb31d70c8c4e04d351680118 100644
--- a/pkg/analyzer_experimental/lib/src/generated/java_core.dart
+++ b/pkg/analyzer_experimental/lib/src/generated/java_core.dart
@@ -291,6 +291,10 @@ class ListWrapper<E> extends Collection<E> implements List<E> {
     return elements.indexOf(element, start);
   }
 
+  void insert(int index, E element) {
+    elements.insert(index, element);
+  }
+
   int lastIndexOf(E element, [int start]) {
     return elements.lastIndexOf(element, start);
   }