fix: only fire backend.onNewParticipant and backend.onLeftParticipant when it is not the local participant, this fixes the issue where onNewParticipant would get triggered when it detects a new call even though you were not in the call, as of now there is no code in those functions which needs to be triggered before you have joined the call so this should be fine
chore: also improve participants join leave tracking logic
with this you can now send the key before joining the call to the participants, make sure to call onMemberStateChanged first to ensure groupCall.participants is populated
td