WebRTC ingestion support

[sirknightj]

Issue #, if available:

• N/A

What was changed?

• Implemented storage session support for master and viewer participants
  • "Send video" switch & UI
  • Error pop-ups for invalid audio+video configurations (video+audio required for ingestion master participant; audio-only or no audio and no video for viewer participants)
• Added additional enhancements to overall sample app experience including:
  • Implemented toast pop-ups for important RTCPeerConnection state changes (connected/failed/disconnected)
  • Fixed the "send audio" switch label to be properly shown on the configuration screen
  • Removed the remote-video view in ingestion mode master participant mode
  • Removed the self-video view in ingestion mode viewer participant mode
• Fixed the pending ice candidates queue logic to allow for ICE candidates to be properly added to the PeerConnection before the offer is received.

Why was it changed?

• Support for KVS WebRTC ingestion
• The demo app provides demonstrates connecting to the storage session and sending the media for ingestion & storage

How was it changed?

• Imported AWSKinesisVideoWebRTCStorage client to be able to call JoinStorageSession and JoinStorageSessionAsViewer to have the storage session initiate the WebRTC connection
• Added UI validation to restrict ingestion viewers from using video with ingest media (audio-only restriction)
• Updated video track creation logic to conditionally create video track based on user selection
• Adjusted viewer logic to wait for offers from storage session and respond with an answer, instead of creating their own offers (switch the logic from controlling peer to controlled peer)
• Adjust the UI to hide the unused views in the ingestion mode (self-view in viewer mode, remote view in master mode)

What testing was done for the changes?

• Tested peer-to-peer connection with the JS chrome (iOS master & iOS viewer)
  • In audio-only mode, video+audio mode, and video-only mode
• Tested WebRTC ingestion
  • iOS Master participant + Chrome viewer participant
  • Chrome Master participant + iOS viewer participant
• Checked that the toasts show up when

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[unicornss]

connectionAttempts