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Prefabs are not affected by Directional Light when Asset Bundles are built for Android platform



How to reproduce:
1. Download the attached project ''
2. Enter Play mode
3. Observe the Scene

Expected result: Prefabs are lit by Directional Light
Actual result: Prefabs are not lit by Directional Light

Reproducible with: 2019.4.32f1, 2020.3.23f1, 2021.2.3f1, 2022.1.0a16

- The issue can be reproduced on Editor and Android devices (when Asset Bundles are built for Android platform)
- The issue can't be reproduced on Editor and Standalone (when Asset Bundles are built for Standalone platform)
- The expected result can be observed by selecting Test > BuildAB from the Menu bar and entering Play mode (Asset Bundles for Standalone will be built)

  1. Resolution Note (2022.1.X):

    In the repro project there were 2 issues that are actually by design:
    - The shaders built inside an Android asset bundle (ie GLES3 shaders) cannot be loaded when running the player inside the Editor as they are not compatible the current graphics device (ie DirectX 11).
    - When unloading the textures (color, dir, and shadowmask) associated to a lightmap, these engine will then use black textures instead since they are not present anymore. If the shaders use the shadowmask, a fully black shadowmask will make the object appear completely black as if in full shadow.

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