init.rc: start all 3 servicemanagers early

With the binder traffic of composer moved to vndbinder,
vndservicemanager is needed to be started early to get bootanim
displayed quickly.

Also servicemanager is required to be start early to support early
bootanim and sufaceflinger.

Bug: 37306311
Test: bootanim regression fixed
Change-Id: Ice1e05bdb3fe4e67a63a49f1db8afdb018c7b61b
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 0b3e3ee..36d7d6a 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -299,7 +299,9 @@
 
 on post-fs
     start logd
+    start servicemanager
     start hwservicemanager
+    start vndservicemanager
 
     # once everything is setup, no need to modify /
     mount rootfs rootfs / ro remount