manifest: android-10.0.0_r40

Change-Id: I5923efa24f835f25e5de990a68b51724f3b0d916

default.xml

@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch="https://android.googlesource.com"
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-10.0.0_r39"
+  <default revision="refs/tags/android-10.0.0_r40"
            remote="aosp"
            sync-c="true"
            sync-j="12" />