Revert "Remove duplicate strings."

Revert submission 19748582-settings_yesno

Reason for revert: Common strings in English could be translated into different strings in other languages.

Reverted changes: /q/submissionid:19748582-settings_yesno

Bug: 272603842
Test: build and open Settings app
Test: atest SettingsRoboTests
Change-Id: Iaad301c5513478fb95e40987ea3ccb4f923d71fa

src/com/android/settings/notification/SpatialAudioParentPreferenceController.java

@@ -71,7 +71,7 @@ public class SpatialAudioParentPreferenceController extends BasePreferenceContro
             return mContext.getString(R.string.spatial_summary_on_one,
                     mContext.getString(R.string.spatial_audio_wired_headphones));
         } else {
-            return mContext.getString(R.string.off);
+            return mContext.getString(R.string.spatial_summary_off);
         }
     }
 }