Mute and unmute in swarm group call

In group swarm call, there are two bugs when muting the microphone. It's the same if only audio or both audio and video. It's been verified with the latest Android client.

1. Alice who initiated the group call needs to click two times on the mute button before the button is lit and her microphone is actually muted. The first click does nothing.
2. Then when Bob joins the group call, it causes Alice's client to go back from muted to unmuted. This is obviously a privacy problem, but at least the unmute is reflected in Alice's user interface.