Changes to sync codephrase

[iccub]

No description provided.

[Uni-verse]

Verification PASSED using 1.41 (22.7.19.13)

Test Devices:
iPhone 12 Pro | iOS 15.5
iPhone X | iOS 14.4.2
iPad (7th Gen) | iPadOS 15.5

Using Test Plan in brave/brave-core#12300 (comment)

Case I:

• Verified connecting to Desktop sync chain with 24 words (old) using mobile/tablet
• Verified able to join sync chain by scanning and entering code words

Case II:

• Verified unable to connect to sync chain on desktop after 2nd of August and later with mobile/tablet device.
• Verified unable to connect iOS devices when changing date on old client to 2nd of August and later

Case III:

• Verified user able to connect to new (25 word) sync chain using mobile/desktop

Mobile	Tablet	Desktop

Case IV:

• Verified error message when connecting to sync chain on other devices with date moved 2 days forward

Example	Example

Case V:

• Verified error message when connecting to sync chain on other devices with date moved 2 days back

Example	Example

Case VI:

• Verified that an error message is display when entering code words incorrectly
• Verified user is able to still connect to sync chain after the error message is displayed

Example	Example