chore: remove ISubscription type casting on RoomOpenerEmbedded

[sampaiodiego]

Proposed changes (including videos or screenshots)

Issue(s)

Steps to test or reproduce

Further comments

CORE-995

[dionisio-bot]

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[changeset-bot]

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Latest commit: 3360d16

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.44%. Comparing base (683df29) to head (3360d16).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #35295   +/-   ##
========================================
  Coverage    59.44%   59.44%           
========================================
  Files         2829     2829           
  Lines        68324    68324           
  Branches     15130    15130           
========================================
  Hits         40612    40612           
  Misses       25054    25054           
  Partials      2658     2658           

Flag	Coverage Δ
unit	75.53% <ø> (ø)

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