Importing mesh with Materials and Textures created default white materials

REGRESSION: Yes
WORKING: 3132914 (Dev-Editor merge into Main)
BROKEN: 3133983

FBX files referencing external textures via absolute path are no longer resolved correctly. This used to work - as seen with Character_SK.
FBX files using embedded media still work as expected.

This image shows the path it's checking when importing back into 3ds Max.

1. Open QAGame in editor.
2. Right-click in the Content Browser and select Import.
3. Find Character_SK.fbx and select Open (can be found in the following location in your P4 build: Engine\Content\NotForLicensees\QA\Import_Test_Assets\FBX\FortniteCharacter)
4. In the Import Options, make sure that Import Materials and Import Textures enabled.
5. Click Import.

RESULT:

The skeletal mesh is imported with white textures.

EXPECTED:

The skeletal mesh is imported with the correct textures.