Implement `Connection` media state management (#41)

[evdokimovs]

Closes #41

Synopsis

Currently, Jason supports remote media disabling/enabling only for whole Room. But we need functional of the partial media disabling/enabling on the ConnectionHandle level.

This PR implements new ConnectionHandle methods:

• ConnectionHandle.enable_remote_video
• ConnectionHandle.disable_remote_video
• ConnectionHandle.enable_remote_audio
• ConnectionHandle.disable_remote_audio

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains Draft: prefix
  • [x] Name contains issue reference
  • [x] Has k:: labels applied
  • [x] Has assignee
• [x] Documentation is updated (if required)
• [x] Tests are updated (if required)
• [x] Changes conform code style
• [x] CHANGELOG entry is added (if required)
• [x] FCM (final commit message) is posted
  • [x] and approved
• [x] Review is completed and changes are approved
• Before merge:
  • [x] Milestone is set
  • [x] PR's name and description are correct and up-to-date
  • [x] Draft: prefix is removed
  • [x] All temporary labels are removed

[evdokimovs]

FCM

Implement `Connection` media state management (#43, #41)