Manifest for Android 7.1.1 Release 50 (N8I11B)

Change-Id: I8408a1ecea6bb994b1af9b45f248a31389d6a9ab
diff --git a/default.xml b/default.xml
index 7dc8826..3d6e687 100644
--- a/default.xml
+++ b/default.xml
@@ -3,7 +3,7 @@
 
   <remote  name="aosp"
            fetch=".." />
-  <default revision="refs/tags/android-7.1.1_r49"
+  <default revision="refs/tags/android-7.1.1_r50"
            remote="aosp"
            sync-j="4" />