Unsuccessful login to Binance Widget after creating a new account

[ryanml]

Description

Additional cookies are expected when retrieving the access token after making a new account, current net code was disabling sending/saving of cookies

Steps to Reproduce

1. Start Brave with a clean profile
2. Go through the Binance widget connect flow, create a new account

Actual result:

You are redirected back to the new tab page, the authed view never shows

Expected result:

You should be logged in, just as you are when connecting with an existing account

Reproduces how often:

100%

[srirambv]

Moving to 1.9.x as brave/brave-core#5651 is uplifted

[srirambv]

Verification passed on

Brave	1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{# 999}
OS	Linux

• Verified creating a new account and connecting widget works in the first attempt
• Verified on both clean and upgrade install

---

Verification passed on

Brave	1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{# 999}
OS	macOS Version 10.15.4 (Build 19E287)

• Verified creating a new account and connecting widget works in the first attempt
• Verified on both clean and upgrade install

---

Verification passed on

Brave	1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{# 999}
OS	Windows 10 OS Version 1809 (Build 17763.379)

• Verified creating a new account and connecting widget works in the first attempt
• Verified on both clean and upgrade install