Manifest for Android 11.0.0 Release 21 (RQ1A.201205.008.A1)

Change-Id: I6054629c4bd7af497021e7fe2061c6ce88aab424
diff --git a/default.xml b/default.xml
index dd2ee7e..ca6b033 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/android-11.0.0_r20"
+  <default revision="refs/tags/android-11.0.0_r21"
            remote="aosp"
            sync-j="4" />