Update search engine default for IN

[rebron]

Description

Update search engine default for India:

• India (IN)

Brave should be at the top of the drop down list at brave://settings/search

Related: #18331, #23814, and #26181

Test plan

Region set to IN

1. Fresh profile
2. Default search engine SHOULD be Brave
3. Visit brave://settings/searchEngines
4. Brave SHOULD be first in the Default search engines list

Region set to anything else (excluding CA / DE / FR / GB / US / AT / ES / MX / BR / AR)

1. Fresh profile
2. Default will NOT be Brave Search
3. Visit brave://settings/searchEngines
4. Brave SHOULD be first in the Default search engines list - unless you're in a region where Yandex is default (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM, UZ). In that case it will be second.

Notes for test plan

#23814 (comment)