Enable telemetry

- Phone back home image downloaded for image popularity research.
  Only in case image comes from our repository (NOT for custom images)

downloadstatstelemetry.h

@@ -0,0 +1,31 @@
+#ifndef DOWNLOADSTATSTELEMETRY_H
+#define DOWNLOADSTATSTELEMETRY_H
+
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright (C) 2020 Raspberry Pi (Trading) Limited
+ */
+
+#include <QObject>
+#include <QThread>
+#include <curl/curl.h>
+
+class DownloadStatsTelemetry : public QThread
+{
+    Q_OBJECT
+public:
+    explicit DownloadStatsTelemetry(const QByteArray &url, const QByteArray &parentcategory, const QByteArray &osname, QObject *parent = nullptr);
+
+protected:
+    CURL *_c;
+    QByteArray _url, _useragent;
+    virtual void run();
+    static size_t _curl_write_callback(char *ptr, size_t size, size_t nmemb, void *userdata);
+    static size_t _curl_header_callback( void *ptr, size_t size, size_t nmemb, void *userdata);
+
+signals:
+
+public slots:
+};
+
+#endif // DOWNLOADSTATSTELEMETRY_H