code: public static void setLimitEventAndDataUsage(Context context, boolean limitEventUsage) {
          SharedPreferences preferences = context.getSharedPreferences(APP_EVENT_PREFERENCES, Context.MODE_PRIVATE);
          SharedPreferences.Editor editor = preferences.edit();
          editor.putBoolean("limitEventUsage", limitEventUsage);
          editor.commit();
      }
docs: Sets whether data such as that generated through AppEventsLogger and sent to Facebook should be restricted from
  being used for purposes other than analytics and conversions, such as for targeting ads to this user.  Defaults
  to false.  This value is stored on the device and persists across app launches.  Changes to this setting will
  apply to app events currently queued to be flushed.
  
  @param context   Used to persist this value across app runs.