Notify the client about the muted state

The logic enforces sending the started state only when the player is not
muted. Muted events are anonymized for unprivileged clients. We still
need to optimize the reporting to unprivileged clients since one can now
receive updates for which nothing changed for their visibility level

Test: dumpsys audio
Bug: 235521198
Change-Id: I3698261ba9edf71b91950ef281086bb0a3af066d