Manifest for Studio 2.2.2

Change-Id: I805aa01120c7dbc892c1efa06ac1a7f9eb21eef8
diff --git a/default.xml b/default.xml
index 0e421f8..46c7b3a 100644
--- a/default.xml
+++ b/default.xml
@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/studio-2.2"
+  <default revision="refs/tags/studio-2.2.2"
            remote="aosp"
            sync-j="4" />