Unify logic for resetting properties before userspace reboot

Since I was there, added two more properties to reset, and switched
ordering of sys.init.updatable_crashing and
sys.init.updatable_crashing_process_name setprops to make sure that
process name is already set when apexd/PackageWatchdog get's notified
about sys.init.updatable_crashing.

Also fixed a typo in what HandleUserspaceReboot function.

Test: adb reboot userspace
Bug: 135984674
Change-Id: I954ec49aae0734cda1bd833ad68f386ecd808f73
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 9cf11a4..fdfcde8 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -978,9 +978,11 @@
 
 on userspace-reboot-requested
   # TODO(b/135984674): reset all necessary properties here.
-  setprop sys.boot_completed 0
-  setprop sys.init.updatable_crashing 0
+  setprop sys.boot_completed ""
+  setprop sys.init.updatable_crashing ""
+  setprop sys.init.updatable_crashing_process_name ""
   setprop apexd.status ""
+  setprop sys.user.0.ce_available ""
 
 on userspace-reboot-fs-remount
   # Make sure that vold is running.