Add QR Code display support

Add a component to support QR Code display required for
different types of provisioning.

examples/common_components/qrcode/esp_qrcode_wrapper.c

@@ -0,0 +1,29 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdio.h>
+#include <esp_err.h>
+
+#include "qrcodegen.h"
+#include "qrcode.h"
+
+int esp_qrcode_get_size(esp_qrcode_handle_t qrcode)
+{
+    return qrcodegen_getSize(qrcode);
+}
+
+bool esp_qrcode_get_module(esp_qrcode_handle_t qrcode, int x, int y)
+{
+    return qrcodegen_getModule(qrcode, x, y);
+}