manager_channels: Fix throwing of HangupHandler manager events

The type value extracted from stasis message data in channel_hangup_handler_cb
isn't compared against the valid values "run", "pop" and "push". Thus the
manager events HangupHandlerPush, HangupHandlerPop and HangupHandlerRun are
never thrown.

This regression was introduced by ASTERISK_21462.

ASTERISK-28252

Change-Id: I9956e35e18da1873113644df1ddc3c7cd37bf524

main/manager_channels.c

@@ -988,11 +988,11 @@ static void channel_hangup_handler_cb(void *data, struct stasis_subscription *su
 		return;
 	}
 
-	if (!strcmp(action, "type")) {
+	if (!strcmp(action, "run")) {
 		event = "HangupHandlerRun";
-	} else if (!strcmp(action, "type")) {
+	} else if (!strcmp(action, "pop")) {
 		event = "HangupHandlerPop";
-	} else if (!strcmp(action, "type")) {
+	} else if (!strcmp(action, "push")) {
 		event = "HangupHandlerPush";
 	} else {
 		return;