Make sure TH services can get restarted if they were ever stopped in emmc-unavaiable-postprocessing

Tested: tested experimental package and worked well
Fusion-Link: fusion2 N/A, will test on TH nightly/weekly
Platforms-Affected: emr, gf
Google-Bug-Id: 510028363
Change-Id: I6934a047c7bf1b36e4a32676dc1b15979c0a9abb

recipes-google/true-hitless/true-hitless/emmc-true-hitless-disable.sh

diff --git a/recipes-google/true-hitless/true-hitless/emmc-true-hitless-disable.sh b/recipes-google/true-hitless/true-hitless/emmc-true-hitless-disable.sh
index 7761408..bf86f09 100644
--- a/recipes-google/true-hitless/true-hitless/emmc-true-hitless-disable.sh
+++ b/recipes-google/true-hitless/true-hitless/emmc-true-hitless-disable.sh
@@ -30,7 +30,10 @@
     expanded_service="${service//@.service/@*.service}"
     echo "Stopping service: $expanded_service" >&2
     systemctl stop "$expanded_service" || true
+    changes_made=1
   done
+else
+  echo "True-Hitless service list is empty, skipping services stopping." >&2
 fi
 
 # 3. Remove emmc-override.conf and block-override.conf files created by true-hitless installation