Android: update UI after downloadSdk() is done

Make sure the UI ticks are updated directly after SDK Tools package
is downloaded.

Change-Id: If1d94c624dcbc5be14246f61b197d849438d19e5
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/android/androidsettingswidget.cpp

@@ -786,6 +786,7 @@ void AndroidSettingsWidget::downloadSdk()
 
             connect(sdkDownloader, &AndroidSdkDownloader::sdkExtracted, this, [this]() {
                 m_sdkManager->reloadPackages(true);
+                updateUI();
                 apply();
             });