Update manifest for android-4.4.2_r2

Change-Id: I975291f18b14adaa4e1f509968f3a9f5820963ec
diff --git a/default.xml b/default.xml
index 7fbeb4a..bd24127 100644
--- a/default.xml
+++ b/default.xml
@@ -3,7 +3,7 @@
 
   <remote  name="aosp"
            fetch=".." />
-  <default revision="refs/tags/android-4.4.2_r1"
+  <default revision="refs/tags/android-4.4.2_r2"
            remote="aosp"
            sync-j="4" />