Fix /data dir creation, 'apmanager' service class.

/data is not guaranteed to be mounted when 'boot' triggers.
'post-fs-data' guarantees that. Also, move the daemon to class
'late_start', since post-fs-data will not happen in time for class
'main'.

Bug: 25373880
Change-Id: I524f0a3e20696f502e534669aebb4d388c6822ea
diff --git a/apmanager.rc b/apmanager.rc
index 3308990..b373d57 100644
--- a/apmanager.rc
+++ b/apmanager.rc
@@ -1,10 +1,10 @@
-on boot
+on post-fs-data
     mkdir /data/misc/apmanager 0700 system system
     mkdir /data/misc/apmanager/hostapd 0700 system system
     mkdir /data/misc/apmanager/dnsmasq 0700 system system
 
 service apmanager /system/bin/apmanager
-    class main
+    class late_start
     user system
     group system dbus net_admin net_raw
     disabled