add uuid_media_reneg api command to tell a channel to send a re-invite with optional list of new codecs

src/include/switch_types.h

@@ -906,6 +906,7 @@ typedef enum {
 	SWITCH_MESSAGE_INDICATE_AUDIO_DATA,
 	SWITCH_MESSAGE_INDICATE_BLIND_TRANSFER_RESPONSE,
 	SWITCH_MESSAGE_INDICATE_STUN_ERROR,
+	SWITCH_MESSAGE_INDICATE_MEDIA_RENEG,
 	SWITCH_MESSAGE_INVALID
 } switch_core_session_message_types_t;