Rename contexts of ffs props

Bug: 71814576
Bug: 154885206
Test: m sepolicy_test
Change-Id: Idacc3635851b14b833bccca177d784f4bb92c763
diff --git a/private/fastbootd.te b/private/fastbootd.te
index 49994b7..1655f00 100644
--- a/private/fastbootd.te
+++ b/private/fastbootd.te
@@ -10,8 +10,8 @@
   get_prop(fastbootd, serialno_prop)
 
   # Set sys.usb.ffs.ready.
-  set_prop(fastbootd, ffs_prop)
-  set_prop(fastbootd, exported_ffs_prop)
+  get_prop(fastbootd, ffs_config_prop)
+  set_prop(fastbootd, ffs_control_prop)
 
   userdebug_or_eng(`
     get_prop(fastbootd, persistent_properties_ready_prop)