Manifest for Android 8.0.0 Release 15 (OPR3.170623.008)

Change-Id: Ic96427b21905538d845224831582b1b4e006fa9b
diff --git a/default.xml b/default.xml
index 35f41f9..bc4b3a4 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-8.0.0_r13"
+  <default revision="refs/tags/android-8.0.0_r15"
            remote="aosp"
            sync-j="4" />