Create separate On/Off string resources for Vibration & haptics

Some translators need to be able to adapt the text for On/Off preference
state to match the preference title "Vibration & haptics", which
requires a different inflection and plural form on some languages.

This change separates this resource string from the more generic one
that was used before to allow this flexible translation.

Fix: 228342641
Fix: 229060423
Test: VibrationPreferenceControllerTest
Change-Id: Ib46b3e0d0a980ff57e91f55c73348c440327bad7

src/com/android/settings/accessibility/VibrationPreferenceController.java

@@ -44,6 +44,9 @@ public class VibrationPreferenceController extends BasePreferenceController {
     public CharSequence getSummary() {
         final boolean isVibrateOn = Settings.System.getInt(mContext.getContentResolver(),
                 Settings.System.VIBRATE_ON, ON) == ON;
-        return mContext.getText(isVibrateOn ? R.string.switch_on_text : R.string.switch_off_text);
+        return mContext.getText(
+                isVibrateOn
+                        ? R.string.accessibility_vibration_settings_state_on
+                        : R.string.accessibility_vibration_settings_state_off);
     }
 }