Fix: Fixed thumbails not loading in MTP devices

[gave92]

Resolved / Related Issues

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• Closes Bug: Thumbnails don't load for MTP devices (Phones) #15084

Added back some code removed in #14423 which is necessary for loading thumbails in MTP.

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Verify that icons are loaded in MTP devices
2. Verify that loading on normal drives is not impacted

[yaira2]

I was thinking we could take this a step forward with a single method in FileThumbnailHelper that would first attempt using the Win32 method, and StorageItem as a fallback.

[gave92]

Ok now thumbnails work in file list, in properties window and preview pane 💪

[yaira2]

If we're anyways passing StorageItem, is there any reason to continue passing the path?

[yaira2]

@gave92

[gave92]

I want to always try first with the path and only if this fails to try with StorageItem. I could use StorageItem.Path but on some locations the Path property is empty.

[yaira2]

Fair enough.

[yaira2]

I'm concerned about maintaining two separate thumbnail systems (we did in the past, with much trouble).
Is there anything we can do with Win32Helper.GetIcon and avoid the need to use StorageThumbnail?