samples: log_rpc_shell: print history usage thr

Added a shell print statement to display the current history usage
threshold after it is set in the log_rpc_history_threshold command. The
change is required for test purposes.

Signed-off-by: Tomasz Kobylarz <[email protected]>

Author: tomaszkob89

samples/nrf_rpc/protocols_serialization/client/src/log_rpc_shell.c

@@ -141,6 +141,7 @@ static int cmd_log_rpc_history_threshold(const struct shell *sh, size_t argc, ch
 
 	shell = sh;
 	log_rpc_set_history_usage_threshold(history_threshold_reached_handler, (uint8_t)threshold);
+	shell_print(sh, "%u", log_rpc_get_history_usage_threshold());
 
 	return 0;
 }