Method isNFTSupported incorrectly checks if the nft already exists

[Incede]

Expected behavior

While receiving nft a chain should check if the nft id is already supported by it

Actual behavior

Due to incorrect logic in isNFTSupported method, it also checks if the nft already exists on the receiving chain

Steps to reproduce

Transfer nft b/w two different chains and observe the logs

Which version(s) does this affect? (Environment, OS, etc...)

feature/6917-implement-nft-module

Additional Information

Relevant LIP PR