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/wifi/WifiSummaryUpdater.java

@@ -87,7 +87,7 @@ public final class WifiSummaryUpdater extends SummaryUpdater {
     @Override
     public String getSummary() {
         if (!mWifiTracker.enabled) {
-            return mContext.getString(R.string.off);
+            return mContext.getString(R.string.switch_off_text);
         }
         if (!mWifiTracker.connected) {
             return mContext.getString(R.string.disconnected);