CRITICAL: Fix double dispose on LazyLoadBitmap (#844)

# Main Goal
Tryfix for launcher crash due to ODE during game/region switch.

This is caused by the `using` clause on the stream causing the
resultStream to somehow getting double disposed during the event
`ImageOnImageOpened` and crashes about 95% of the time during
game/region change.

## PR Status :
- Overall Status : Done
- Commits : Done
- Synced to base (Collapse:main) : Yes
- Build status : OK
- Crashing : Yes
- Bug found caused by PR : 0

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Author: Cryotechnic

CollapseLauncher/XAMLs/MainApp/ValueConverters.cs

@@ -718,7 +718,7 @@ await CacheManager
                                                CancellationToken.None);
 
                 resultStream = result.Stream;
-                using IRandomAccessStream stream = resultStream.AsRandomAccessStream(true);
+                IRandomAccessStream stream = resultStream.AsRandomAccessStream(true);
                 image.ImageOpened += ImageOnImageOpened;
 
                 await image.SetSourceAsync(stream);