React on ClientVersionUpdatedEvent from ConversationViewModel

/**
 * An event that is broadcast when we receive a client versioning update from
 * a contact.
 */

https://code.briarproject.org/briar/briar/-/blob/a53a49e543e3190f329b8608ecec157da4047b89/bramble-api/src/main/java/org/briarproject/bramble/api/versioning/event/ClientVersionUpdatedEvent.java

TODO here: https://code.briarproject.org/briar/briar-desktop/-/blob/d1e668dec33d8f309a6f6d99bbc8b4af015475d2/src/main/kotlin/org/briarproject/briar/desktop/conversation/ConversationViewModel.kt#L363