Put bootanimation in top-app stune group.

bug 29512132

Change-Id: Id39650177b1f3b1ca24edb72b2809ee4ded396a1
diff --git a/cmds/bootanimation/bootanim.rc b/cmds/bootanimation/bootanim.rc
index ee0d0b8..7344ba7 100644
--- a/cmds/bootanimation/bootanim.rc
+++ b/cmds/bootanimation/bootanim.rc
@@ -4,3 +4,4 @@
     group graphics audio
     disabled
     oneshot
+    writepid /dev/stune/top-app/tasks
\ No newline at end of file