updated the previously owned state for nft (#1082)

Fixes
[17206](MetaMask/metamask-extension#17206)

Ideally, when a user previously owned an NFT, and then received the same
one back, we'd put that NFT back into its own group. With the current
implementation, the NFT is always stuck in the Previously Owned
category, even when imported again. This PR is to update the Nft
Controllers to add the NFT back to its own group if we are re-importing
it.

packages/assets-controllers/src/NftController.ts

@@ -619,7 +619,7 @@ export class NftController extends BaseController<NftConfig, NftState> {
           nftMetadata,
           existingEntry,
         );
-        if (differentMetadata) {
+        if (differentMetadata || !existingEntry.isCurrentlyOwned) {
           // TODO: Switch to indexToUpdate
           const indexToRemove = nfts.findIndex(
             (nft) =>