Android: Fix sdkmanager timing out on slower machines

sdkmanager times out on slower machines or with slower network
connection. Increase the timeout and show timeout message box

Task-number: QTCREATORBUG-18458
Change-Id: I9118024ec1438ef9c18842df2f7431e696c73f92
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/android/androidsdkmanager.h

@@ -40,7 +40,7 @@ public:
     AndroidSdkManager(const AndroidConfig &config);
     ~AndroidSdkManager();
 
-    SdkPlatformList availableSdkPlatforms();
+    SdkPlatformList availableSdkPlatforms(bool *ok = nullptr);
 
 private:
     const AndroidConfig &m_config;