Fix joining room freeze

[rogurotus]

Synopsis

Resolves #105

If you close the last room, and then try join a new one, the join process will be eternal.
Also, if if this is done without delay, an error occurs RpcClientException.

Checklist

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[rogurotus]

FCM:

Fix `RoomHandle.join` not resolving (#106, #105)

Additionally:
- fix build for Flutter Web
- rename `MediaDeviceInfo` to `MediaDeviceDetails`
- rename `MediaDisplayInfo` to `MediaDisplayDetails`