ProjectExplorer: Make sure toolControlChannel URLs come with a scheme

QML Profiler won't accept URLs without schemes anymore.

Change-Id: I54995ae7e9c1bcdb9f55fe5d56a45931f14cf890
Reviewed-by: hjk <hjk@qt.io>

src/plugins/android/androiddevice.cpp

@@ -107,6 +107,7 @@ IDevice::Ptr AndroidDevice::clone() const
 QUrl AndroidDevice::toolControlChannel(const ControlChannelHint &) const
 {
     QUrl url;
+    url.setScheme(urlTcpScheme());
     url.setHost("localhost");
     return url;
 }