Annotate Iterator and ArrayList.

You can see the source files with the annotations in
https://android-review.googlesource.com/c/platform/libcore/+/692543
(which obviously is not intended for submission). The .jaif changes
here were copy-and-pasted from the results of running the
extract-annotations tool on those sources.

Test: make docs
Bug: 64930165
Change-Id: Ib564dbca931fc9a496d29da4a68a14757d31b63a
diff --git a/annotated_java_files.bp b/annotated_java_files.bp
index 7887a1d..ca43878 100644
--- a/annotated_java_files.bp
+++ b/annotated_java_files.bp
@@ -36,6 +36,8 @@
         "ojluni/src/main/java/java/lang/reflect/Type.java",
         "ojluni/src/main/java/java/lang/reflect/TypeVariable.java",
         "ojluni/src/main/java/java/lang/reflect/WildcardType.java",
+        "ojluni/src/main/java/java/util/ArrayList.java",
+        "ojluni/src/main/java/java/util/Iterator.java",
         "ojluni/src/main/java/java/util/List.java",
     ],
 }