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/gestures/GesturePreferenceController.java

@@ -60,8 +60,7 @@ public abstract class GesturePreferenceController extends TogglePreferenceContro
 
     @Override
     public CharSequence getSummary() {
-        return mContext.getText(
-                isChecked() ? R.string.gesture_setting_on : R.string.gesture_setting_off);
+        return mContext.getText(isChecked() ? R.string.on : R.string.off);
     }
 
     @Override