manifest: android-11.0.0_r1 -> android-11.0.0_r4

Change-Id: I12ef3709b8e51070e9b9560ee6d9f2dc0900e90d
diff --git a/default.xml b/default.xml
index b8156de..e57614e 100644
--- a/default.xml
+++ b/default.xml
@@ -11,7 +11,7 @@
   <remote  name="aosp"
            fetch="https://android.googlesource.com"
            review="android-review.googlesource.com"
-           revision="refs/tags/android-11.0.0_r1" />
+           revision="refs/tags/android-11.0.0_r4" />
 
   <default revision="refs/heads/lineage-18.0"
            remote="github"