Start apmanager during startup on Android

Bug:24575517
TEST=Verify apmanager is running after dragonboard started

Change-Id: I43070b3dcb5e03dfc54bc54c05859f0af25b71ad
diff --git a/apmanager.rc b/apmanager.rc
index 7a30834..3e1fed0 100644
--- a/apmanager.rc
+++ b/apmanager.rc
@@ -7,4 +7,3 @@
     class main
     user system
     group system dbus net_admin net_raw
-    disabled