Use Utils::Storage instead of QVariantMap in a few places

Change-Id: I02833cf2bc3caaadc22ff93ae530e4aebe4c3868
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/android/androidsdkdownloader.cpp

@@ -183,7 +183,7 @@ void AndroidSdkDownloader::downloadAndExtractSdk()
     };
 
     const Group root {
-        Storage(storage),
+        Tasking::Storage(storage),
         NetworkQueryTask(onQuerySetup, onQueryDone, onQueryError),
         UnarchiverTask(onUnarchiveSetup, onUnarchiverDone, onUnarchiverError)
     };