Update message for Back button.

Bug: 78662095
Test: make
Change-Id: I6b6a59022976444d11fc9c2291eb67a89bec08aa
(cherry picked from commit 70ac97f2aa04df771778bc68c54c9070a3bab73e)
diff --git a/service/res/values/strings.xml b/service/res/values/strings.xml
index 6508e34..c2fafa8 100644
--- a/service/res/values/strings.xml
+++ b/service/res/values/strings.xml
@@ -107,7 +107,7 @@
     <!-- Blocking activity: Message to show to user when a feature of current application is not allowed. [CHAR LIMIT=120] -->
     <string name="activity_blocked_text">For your safety, this activity isn\'t available while driving.\nTo continue, wait until you\'re parked.</string>
     <!-- Blocking activity: Message to accompany the exit_button that restarts the blocked app. [CHAR LIMIT=120] -->
-    <string name="exit_button_message">To start over with app features that can be used safely, select <xliff:g id="exit_button" example="Back">%s</xliff:g>.</string>
+    <string name="exit_button_message">To start over with safe app features, select <xliff:g id="exit_button" example="Back">%s</xliff:g>.</string>
     <!-- Blocking activity: Text for button that restarts the current blocked application. [CHAR LIMIT=15] -->
     <string name="exit_button">Back</string>
     <!-- Blocking activity: Text for button that shows debug info for non-user build. [CHAR LIMIT=10] -->