Added Power off capability

Change-Id: I545f8b73e84c5083d2d17b98f8edcdd612c0f78e
diff --git a/default_recovery_ui.c b/default_recovery_ui.c
index 9c192a2..51fd330 100644
--- a/default_recovery_ui.c
+++ b/default_recovery_ui.c
@@ -30,6 +30,7 @@
                        "backup and restore",
                        "mounts and storage",
                        "advanced",
+                       "power off",
                        NULL };
 
 int device_recovery_start() {