Add additional Password-protection for Wallet Backup Seed reveal

[josheleonard]

Description

To increase the overall security, revealing the Brave Wallet backup seed phrase from should require re-entering the wallet password

Steps to Reproduce

1. Unlock the Brave wallet
2. Navigate to Portfolio Screen -> Click the "..." icon -> Select "Back up Now" -> Agree to Terms -> Continue

Actual result:

Seed is revealed without additional credential check

Expected result:

User is prompted to enter their password before they can click the "continue" button

[diracdeltas]

@josheleonard is this from the doyensec audit?

[srirambv]

Verification passed on

Brave	1.45.88 Chromium: 106.0.5249.91 (Official Build) beta (64-bit)
Revision	fa96d5f07b1177d1bf5009f647a5b8c629762157-refs/branch-heads/5249@{#707}
OS	Linux

• Verified steps from brave/brave-core#14541
• Verified additional password-protection is shown before revealing Backup Seed words

24534.mp4

---

Verification passed on

Brave	1.45.88 Chromium: 106.0.5249.91 (Official Build) beta (64-bit)
Revision	fa96d5f07b1177d1bf5009f647a5b8c629762157-refs/branch-heads/5249@{#707}
OS	Windows 11 Version 21H2 (Build 22000.978)

• Verified steps from brave/brave-core#14541
• Verified additional password-protection is shown before revealing Backup Seed words

24534.mp4

---

Verification passed on

Brave	1.45.88 Chromium: 106.0.5249.91 (Official Build) beta (arm64)
Revision	fa96d5f07b1177d1bf5009f647a5b8c629762157-refs/branch-heads/5249@{#707}
OS	macOS Version 12.4 (Build 21F79)

• Verified steps from brave/brave-core#14541
• Verified additional password-protection is shown before revealing Backup Seed words

24534.mov