LPS-40873 Use A.mix() for config objects
LPS-40873 Use A.Array.each()
LPS-40873 e -> event
LPS-40873 elem -> el
LPS-40873 Use A.JSON
LPS-40873 Use AUI for WebRTC adapter
LPS-40873 Use A.UA
LPS-40873 webrtc_adapter.js: use single quotes
LPS-40873 search -> indexOf
LPS-40873 Shorten block
LPS-40873 Fix debug format message
LPS-40873 Simplify WebRTC adapter's _setDefaultCodec()