Manifest for Android 9.0.0 Release 8 (PPR2.180905.006.A1)

Change-Id: Idf7b5f52f788d687e104a2f1b6b2f9b3fc2651f8

default.xml

@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-9.0.0_r7"
+  <default revision="refs/tags/android-9.0.0_r8"
            remote="aosp"
            sync-j="4" />