Updates to the Web Client SDK (v3.4.0-beta.2) Android Client SDK (v3.4.0-beta.2), and Conference REST API

Web Client SDK

3.4.0-beta.2

Support for setting the spatial audio scene for listeners using the Set Spatial Listeners Audio REST API. The setSpatialDirection, setSpatialEnvironment, and setSpatialPosition methods are not available for listeners and trigger the UnsupportedError.
Modified the possible values of the setSpatialEnvironment parameters. The forward, up, and right parameters can be set to either +1, 0, or -1. Otherwise, the SDK emits the ParameterError.

Fixed an issue where the audioTransmitting property does not reflect the correct audio transmitting status.
Fixed an issue where a 503 error occurs after a remote participant leaves a conference that is enabled spatial audio.

The Android Client SDK now allows joining conferences with enabled video.
Added the DemoOptions and DemoOptions.Builder models that allow setting spatial audio in demo conferences and checking if spatial audio is enabled.
Added the following parameters to the ParamsHolder model:
- setTtl: Allows customizing time after which the SDK terminates empty conferences.
- setRtcpMode: Allows setting the bitrate adaptation mode for video transmission.
- setLiveRecording: A boolean that enables and disables live recording.

Support for setting the spatial audio scene for listeners using the Set Spatial Listeners Audio REST API. The setSpatialDirection, setSpatialEnvironment, and setSpatialPosition methods are not available for listeners and trigger the UnsupportedError.
Renamed the following FilePresentationService methods:
- The convertFile method is renamed to convert
- The getImage method is renamed to image
- The getThumbnail method thumbnail
Modified the possible values of the setSpatialEnvironment parameters. The forward, up, and right parameters can be set to either +1, 0, or -1. Otherwise, the SDK emits the SpatialAudioException.
Modified the ActiveSpeakerChangeEvent that now contains the conference and activeParticipants properties.
Full support for AndroidX; all remaining references to support library are updated to AndroidX.

Fixed an issue where the audioTransmitting property does not reflect the correct audio transmitting status.
Fixed an issue where a 503 error occurs after a remote participant leaves a conference that is enabled spatial audio.
Fixed an issue where the decline method is not responding properly on Conference Access Token enabled keys.
Fixed an issue where audio devices continue to be managed by the SDK after leaving the conference.
Fixed an issue where unsubscribe did not function as expected.
Fixed the following issues with FilePresentation:
- convert did not resolve properly
- Issues with FilePresentation logic
- Duplicate presentation events added to list of known presentations

Added a new Set Spatial Listeners Audio REST API that sets the spatial audio scene for listeners.