[resources] Select default resource if there are no exact language+region or default language match

[terrakok]

We need to filter by language and region together because there is slightly different logic:

1. if there is the exact match language+region then use it
2. if there is the language WITHOUT region match then use it
3. in other cases use items WITHOUT language and region qualifiers at all

Given resources:
values
values-en-rUS
values-de

Filter results:
"en" -> values
"en-US" -> values-en-rUS
"en-GB" -> values
"de-IT" -> values-de

fixes #4571