on boot class_start hal

Now that we have HALs in recovery, class_start hal
on boot trigger.

Test: manual
Bug: 170338625
Change-Id: Ibfaabb3573252b681279cf05bbf07f8776bd9063
diff --git a/etc/init.rc b/etc/init.rc
index 4efee30..e4afecf 100644
--- a/etc/init.rc
+++ b/etc/init.rc
@@ -55,6 +55,7 @@
     domainname localdomain
 
     class_start default
+    class_start hal
 
 on firmware_mounts_complete
    rm /dev/.booting