Material Shared Samplers do not honor Texture Quality console variables

When using shared samplers in the material do not adjust quality when adjusting the console variable or texture quality in Engine Scalability for SG.TextureQuality.

Attached is an image for demonstration of this.

Image flips between sg.TextureQuality 0 and 3.

Mesh on the left uses the default settings for texture.
Mesh on the right uses the shared sampler for the texture.

1. Open UE4
2. Create a Material with a Texture
3. Select the Texture in the Material and set it to use Shared:Wrapped or Clamped
4. Apply the material to a static mesh
5. Set the Console Variable for SG.TextureQuality from 3 to 0. or use the Texture option for Low in the Engine Scalability Settings

Regression: No

Results: The materials using shared samplers do not adhere to Texture Quality settings.

Expected: the Texture Quality settings should apply to shared samplers as well.

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