service: vi: Implement missing IApplicationDisplayService functions

Implements missing functions and improves permission handling in the VI
(Visual Interface) IApplicationDisplayService based on official documentation.

Key changes:
- Add session type enum to properly handle vi:u/vi:s/vi:m permissions
- Implement GetIndirectLayerImageCropMap for handling cropped layer images
- Implement GetDisplayVsyncEventForDebug for debug vsync event handling
- Add proper permission checks for GetSystemDisplayService and GetManagerDisplayService
- Improve AppletResourceUserId validation in OpenLayer
- Clean up logging and error handling

The changes follow the official documentation for permission handling:
- vi:u sessions can only use GetRelayService
- vi:s sessions can use everything except GetManagerDisplayService
- vi:m sessions can use all commands

REFS: switchbrew.org/wiki/Display_services#IApplicationDisplayService

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