Add DeviceVerificationFlow dummy and verification test button

src/DeviceVerificationFlow.cpp

@@ -0,0 +1,36 @@
+#include "DeviceVerificationFlow.h"
+
+#include <QTimer>
+
+static constexpr int TIMEOUT = 2 * 60 * 1000; // 2 minutes
+
+DeviceVerificationFlow::DeviceVerificationFlow(QObject *)
+{
+        timeout = new QTimer(this);
+        timeout->setSingleShot(true);
+        connect(timeout, &QTimer::timeout, this, [this]() {
+                emit timedout();
+                this->deleteLater();
+        });
+        timeout->start(TIMEOUT);
+}
+
+//! accepts a verification and starts the verification flow
+void
+DeviceVerificationFlow::acceptVerificationRequest()
+{
+        emit verificationRequestAccepted(rand() % 2 ? Emoji : Decimal);
+}
+//! cancels a verification flow
+void
+DeviceVerificationFlow::cancelVerification()
+{
+        this->deleteLater();
+}
+//! Completes the verification flow
+void
+DeviceVerificationFlow::acceptDevice()
+{
+        emit deviceVerified();
+        this->deleteLater();
+}