GetSubPaths does not return any paths when used in Standalone

Using the GetSubPaths command in Standalone does not return any paths. From the answerhub user's research, it seems that CachedPathTree in AssetRegistry.cpp is not being initialized like it is in either PIE or in a packaged game.

Regression?: No
This also occurred in 4.13

1. Download the attached project
2. Set a breakpoint on Line #30 of MyActor.cpp
3. Compile the project for DebugGameEditor and launch it in debug
4. Launch the game in Standalone from the editor
5. In Visual Studio, attach the debugger to the Standalone game process
6. A breakpoint will be triggered, check the value of the PathsToScan variable
   Result: The PathsToScan variable is empty
   Expected: The PathsToScan variable is populated as it is in PIE