Browser: Update search engines

- Use Google HTTPS
- Correct URL of Rambler
- Add DuckDuckGo
- Use Dutch versions of search engines for Dutch users

>> Gingerbread: http://review.cyanogenmod.com/#/c/20770
>> ICS:         http://review.cyanogenmod.com/#/c/20654/

Change-Id: I243a0e1cb14ec820b34bf6a35032fcc639588fbf