runfix: calls in mls 1:1 conversations

[PatrykBuniX]

Description

This PR ensures that client will not try to fetch/join MLS conference subconversations for 1:1 MLS conversation calls. Subconversations are only supported by regular group mls conversations. For 1:1 MLS conversations we should use the same type we do for proteus 1:1 conversations - ONEONONE (0).

Checklist

• PR has been self reviewed by the author;
• Hard-to-understand areas of the code have been commented;
• If it is a core feature, unit tests have been added;

[codecov]

Codecov Report

Merging #16255 (d5cb4e3) into dev (845c328) will decrease coverage by 0.09%.
Report is 1 commits behind head on dev.
The diff coverage is 44.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #16255      +/-   ##
==========================================
- Coverage   45.27%   45.19%   -0.09%     
==========================================
  Files         708      708              
  Lines       23341    23354      +13     
  Branches     5329     5330       +1     
==========================================
- Hits        10567    10554      -13     
- Misses      11413    11451      +38     
+ Partials     1361     1349      -12