vold: Reboot if vold failure

Vold stores some status in memory.
If vold crashed and restarted, those status are not
restored. Reboot device if vold on failure.

Bug: 202048432
Test: manually kill vold
Change-Id: Ic56acd9cc906b0166adf805023e34bbd6b3648a5
diff --git a/vold.rc b/vold.rc
index 0252c2f..9474a1e 100644
--- a/vold.rc
+++ b/vold.rc
@@ -6,3 +6,4 @@
     task_profiles ProcessCapacityHigh
     shutdown critical
     group root reserved_disk
+    reboot_on_failure reboot,vold-failed