manifest: android-8.1.0_r26 -> android-8.1.0_r30

Change-Id: If833c5bcea5dade15d00b86ce5fe9e58f3c9f24b
diff --git a/default.xml b/default.xml
index f39fa71..d649813 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-8.1.0_r26" />
+           revision="refs/tags/android-8.1.0_r30" />
 
   <default revision="refs/heads/lineage-15.1"
            remote="github"