Add String resources for Background User sound notification

Bug: 333676701
Test: manual
Change-Id: I660cc62789963f149c993207e655717617640152
diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index f3aa27f..58e1bb4 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -6457,4 +6457,16 @@
     <string name="satellite_notification_how_it_works">How it works</string>
     <!-- Initial/System provided label shown for an app which gets unarchived. [CHAR LIMIT=64]. -->
     <string name="unarchival_session_app_label">Pending...</string>
+
+    <!-- Background user sound notification related messages -->
+    <!-- Notification title when sound comes from a call on background user [CHAR LIMIT=NOTIF_TITLE]-->
+    <string name="bg_user_sound_notification_title_call">Call for <xliff:g id="user_name" example="John Doe">%s</xliff:g></string>
+    <!-- Notification title when sound comes from an alarm or timer on background user [CHAR LIMIT=NOTIF_TITLE]-->
+    <string name="bg_user_sound_notification_title_alarm">Alarm for <xliff:g id="user_name" example="John Doe">%s</xliff:g></string>
+    <!-- Notification action button to prompt user switch to the background user [CHAR LIMIT=NONE] -->
+    <string name="bg_user_sound_notification_button_switch_user">Switch user</string>
+    <!-- Notification action button to mute the sound from the background user [CHAR LIMIT=NONE] -->
+    <string name="bg_user_sound_notification_button_mute">Mute</string>
+    <!-- Notification content action to mute the sound from the background user [CHAR LIMIT=NOTIF_BODY]-->
+    <string name="bg_user_sound_notification_message">Tap to mute sound</string>
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index c4033f2..1385e68 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -5381,6 +5381,13 @@
   <java-symbol type="string" name="satellite_notification_how_it_works" />
   <java-symbol type="drawable" name="ic_satellite_alt_24px" />
 
+  <!-- System notification for background user sound -->
+  <java-symbol type="string" name="bg_user_sound_notification_title_call" />
+  <java-symbol type="string" name="bg_user_sound_notification_title_alarm" />
+  <java-symbol type="string" name="bg_user_sound_notification_button_switch_user" />
+  <java-symbol type="string" name="bg_user_sound_notification_button_mute" />
+  <java-symbol type="string" name="bg_user_sound_notification_message" />
+
   <!-- DisplayManager configs. -->
   <java-symbol type="bool" name="config_evenDimmerEnabled" />