ensure facade interfaces get registered in external service collection

[david-driscoll]

No description provided.

[codecov]

Codecov Report

Merging #477 (e6e1c3e) into master (04dc114) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #477      +/-   ##
==========================================
+ Coverage   72.63%   72.67%   +0.04%     
==========================================
  Files         254      254              
  Lines       12245    12269      +24     
  Branches      832      832              
==========================================
+ Hits         8894     8917      +23     
- Misses       3351     3352       +1     

Impacted Files	Coverage Δ
...lient/LanguageClientServiceCollectionExtensions.cs	97.14% <100.00%> (+0.17%)	⬆️
...t/DebugAdapterClientServiceCollectionExtensions.cs	96.80% <100.00%> (+0.21%)	⬆️
...r/DebugAdapterServerServiceCollectionExtensions.cs	96.20% <100.00%> (+0.31%)	⬆️
...erver/LanguageServerServiceCollectionExtensions.cs	97.34% <100.00%> (+0.14%)	⬆️
src/Shared/LspRequestRouter.cs	98.00% <0.00%> (-2.00%)	⬇️

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