Disconnect uphold if we get 403 from uphold

[NejcZdovc]

Description

Right now when there is uphold server problem 403 or 404 (when fetching a balance) we return error to the UI that sticks. What we should do is in this cases disconnect wallet and return ok to the UI.

Steps to Reproduce

Actual result:

Expected result:

Reproduces how often:

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the dev channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

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

Miscellaneous Information:

[LaurenWags]

Verified passed with

Brave	1.9.70 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS	macOS Version 10.14.6 (Build 18G3020)

• Verified test plan from Handle 404 and 403 errors from uphold brave-core#5470

Before changing address in Preferences:

After changing address in Preferences:

[ RESPONSE - OnFetchBalance ]
> time: 1589837628
> result: Failure
> http code: 404

• Confirmed able to reconnect to Uphold after running thru test plan.

Verification passed on

Brave	1.9.70 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS	Ubuntu 18.04 LTS

• Verified test plan from Reset wallet completely on disconnect brave-core#5551

After changing the wallet address to random string:

After restart, the wallet address is empty
"external_wallets":{"uphold":{"address":"","one_time_string":"4255D5F56724415D90E41BF6C8ABC7157020829669327A1EAFD2B008DF866B86","status":3,"token":"","transferred":false,"user_name":""}}
After reconnecting:

Verified the ability to tip after reconnecting

Verification passed on

Brave | 1.9.70 Chromium: 81.0.4044.138 (Official Build) (64-bit)
-- | --
Revision | 8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS | Windows 10 OS Version 1803 (Build 17134.1006)

• Verified test plan from Handle 404 and 403 errors from uphold brave-core#5470

Before changing address in Preferences:

After changing address in Preferences:

[ RESPONSE - OnFetchBalance ]
> time: 1589912613
> result: Failure
> http code: 404

• Confirmed able to reconnect to Uphold after running thru test plan.