Added NFT's for pinning are not removed when a new wallet is restored

[srirambv]

Description

Added NFT's for pinning are not removed when a new wallet is restored

Steps to Reproduce

1. Create a wallet and and enable NFT pinning flag
2. Add a bunch of NFT's and pin them
3. Lock Wallet and restore a different wallet from seed phrase
4. All NFT's that are pinned before is still retained

Actual result:

NFT.on.wallet.restore.mp4

Expected result:

Should probably remove the NFT's pinned for that wallet

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.50.106 Chromium: 112.0.5615.39 (Official Build) beta (64-bit)
Revision	a0e7b9718a92bcd1cf33b7c95316caff3fc20714-refs/branch-heads/5615@{#753}
OS	Windows 11 Version 22H2 (Build 22621.1344)

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

cc: @jamesmudgett @cypt4 @yrliou