Explicitly set user root for the gs_watchdogd service.

Otherwise host_init_verifier would fail.

Bug: 362447627
Test: Treehugger
Merged-In: I36a3a67dc357f608b33a131a4e5f6fd6defb91e5
Change-Id: I36a3a67dc357f608b33a131a4e5f6fd6defb91e5
diff --git a/gs_watchdogd/init.gs_watchdogd.rc b/gs_watchdogd/init.gs_watchdogd.rc
index f58ce50..a7ef505 100644
--- a/gs_watchdogd/init.gs_watchdogd.rc
+++ b/gs_watchdogd/init.gs_watchdogd.rc
@@ -1,5 +1,6 @@
 # Set watchdog timer to 30 seconds and pet it every 10 seconds to get a 20 second margin
 service gs_watchdogd /system_ext/bin/gs_watchdogd 10 20
+    user root
     class core
     oneshot
     seclabel u:r:gs_watchdogd:s0