docs: public void start() {
          if (hasVibratePermission(mContext)) {
              mVibrator = (Vibrator) mContext.getSystemService(Service.VIBRATOR_SERVICE);
          }
  
          // Setup a listener for changes in haptic feedback settings
          mIsGloballyEnabled = checkGlobalSetting(mContext);
          Uri uri = Settings.System.getUriFor(Settings.System.HAPTIC_FEEDBACK_ENABLED);
          mContext.getContentResolver().registerContentObserver(uri, false, mContentObserver);
      }