This reverts commit a83a8e04

Do not reinvite group chat participant device in the left state if this participant has been removed.

restricted do regular zrtp operations and getPeerStatus

To be completed for lime v1 access

(cherry picked from commit 1a0d5bad)

# Conflicts:
#	coreapi/linphonecore.c

Fix double release() of Sal::Op in a rare case where a LinphoneFriend is detached from its FriendList.