Android: Set scheme on QML server URL

The QML connection manager won't accept URLs without scheme anymore.

Task-number: QTCREATORBUG-19046
Change-Id: Ic31787b806ab965f57a4585ee55681a488a88c56
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/android/androidrunner.cpp

@@ -763,6 +763,7 @@ void AndroidRunner::qmlServerPortReady(Port port)
     // host port n to target port n via adb.
     QUrl serverUrl;
     serverUrl.setPort(port.number());
+    serverUrl.setScheme(urlTcpScheme());
     emit qmlServerReady(serverUrl);
 }