Add init command to set verified properties

Add a command that updates dm-verity state and sets partition.%.verified
properties used by adb remount.

This is needed in init since fs_mgr cannot set properties:
    I6a28cccb1ccce960841af20a4b20c32d424b5524

Change-Id: I0fdf5bc29c56690dcadff9d0eb216d3c68483538
diff --git a/init/init_parser.cpp b/init/init_parser.cpp
index f3d34b2..7db203f 100644
--- a/init/init_parser.cpp
+++ b/init/init_parser.cpp
@@ -202,6 +202,7 @@
         break;
     case 'v':
         if (!strcmp(s, "erity_load_state")) return K_verity_load_state;
+        if (!strcmp(s, "erity_update_state")) return K_verity_update_state;
         break;
     case 'w':
         if (!strcmp(s, "rite")) return K_write;