Rename exported and exported2 vold prop

This is a subtask to clean up bad context names "exported*_prop".

Bug: 152469526
Test: m
Change-Id: Ie2d4046732e9d6562294fa664dcd7f019aa7c229
diff --git a/private/vold.te b/private/vold.te
index 19d74b1..3210779 100644
--- a/private/vold.te
+++ b/private/vold.te
@@ -19,9 +19,10 @@
 type_transition vold mnt_media_rw_file:dir mnt_media_rw_stub_file;
 
 # Property Service
+get_prop(vold, vold_config_prop)
+
 set_prop(vold, vold_prop)
-set_prop(vold, exported_vold_prop)
-set_prop(vold, exported2_vold_prop)
+set_prop(vold, vold_status_prop)
 set_prop(vold, powerctl_prop)
 set_prop(vold, ctl_fuse_prop)
 set_prop(vold, restorecon_prop)