default: Use android 4.3.1

Change-Id: If0251ea3ed121050fad756ac0fa1a9b615418cb5

default.xml

@@ -15,7 +15,7 @@
            review="gerrit.omnirom.org"
            fetch="https://github.com/omnirom" />
 
-  <default revision="refs/tags/android-4.3_r3.1"
+  <default revision="refs/tags/android-4.3.1_r1"
            remote="aosp"
            sync-j="4" />