manifest: android-7.1.1_r21 -> android-7.1.1_r25

Change-Id: I4cea4d1cf4b03a64a4b479d75ed0371a833a9e1f
diff --git a/default.xml b/default.xml
index 5440249..240306b 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-7.1.1_r21" />
+           revision="refs/tags/android-7.1.1_r25" />
 
   <default revision="refs/heads/cm-14.1"
            remote="github"