Remove duplicate strings.

"Yes" and "no" were redefined many times with no clear benefit, so this
consolidates them into one definition.

Bug: 243843096
Test: Build, install, and open the Settings app
Test: atest SettingsRoboTests
Change-Id: I5f84d09f223efd478461ded93aeac82bf7b128d8

src/com/android/settings/display/AutoBrightnessPreferenceController.java

@@ -57,9 +57,7 @@ public class AutoBrightnessPreferenceController extends TogglePreferenceControll
 
     @Override
     public CharSequence getSummary() {
-        return mContext.getText(isChecked()
-                ? R.string.auto_brightness_summary_on
-                : R.string.auto_brightness_summary_off);
+        return mContext.getText(isChecked() ? R.string.on : R.string.off);
     }
 
     @Override