feat(multi-stream-support) Support track streaming status

[WillLiang918]

Start listening to the TRACK_STREAMING_STATUS_CHANGED event introduced in jitsi/lib-jitsi-meet#1855. This implementation still assumes only one video track per participant.

High level objectives:

• Handle the init and dispose logic for TrackStreamingStatus when a connection icon is rendered. This is an optimization to help the performance in large conferences.
• Replace the participant connection status logic with track streaming status throughout the code base. Ensure backwards compatibility when the feature flag is disabled and feature parity when enabled.
• Add streamingStatus property to the Track data model in the redux store and add code to update this new property.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[jallamsetty1]

Jenkins add to whitelist.

[paweldomas]

I think the code looks good. There's one problem that we don't have to solve right now, which is that whether or not things will work depends if the connection indicator is in the UI for some non reactified code (large video?). The connection indicator is the one that's writing track streaming status to redux. Eventually, the goal should be to reactify the large video, so that it uses a hook and checks for the status locally.

[paweldomas]

I will approve after testing.