Issue 835350 Customize Browser Bookmark via iccsettings

* change default customize file 'bookmark.json' with additional carrier+nation key (use mcc, mnc pair as key from http://en.wikipedia.org/wiki/Mobile_country_code) 
* use pattern from system/js/operator_variant/operator_variant.js to get mcc/mnc values in settings

* Try match best bookmark setting by
  * 1. chck carrier with region
  * 2. check carrier default
  * 3. fallback to no SIM card case