Armadillos can not spawn on stained terracottas in badlands biomes

Description:
Many stained terracottas can be found in badlands biomes. However, armadillos can not spawn on stained terracottas, which causes armadillos to spawn less in badlands biomes.

Steps to Reproduce:

1. Go to badlands biome or its variants
2. Wait for few minutes

Observed Results:
Armadillos only spawn on unstained terracottas but not stained terracottas.

Expected Results:
Armadillos should spawn on both unstained terracottas and stained terracottas.