Expose display list APIs

The exposed APIs are slightly simpler than the full APIs used internally.
Only APIs useful to applications are exposed.

Change-Id: Ie03014628d40ad5ef63dedbc52ce3def84429d54
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index a4898fc..5105fda 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -4413,7 +4413,7 @@
             v.mTop += offset;
             v.mBottom += offset;
             if (v.mDisplayList != null) {
-                v.mDisplayList.offsetTopBottom(offset);
+                v.mDisplayList.offsetTopAndBottom(offset);
                 invalidateViewProperty(false, false);
             }
         }