Rewards verified status should be fetched from list value rather than from database

[jasonrsadler]

Description

If a user visits an unverified site that later becomes verified, that site will still show unverified for that user

Steps to Reproduce

1. Enable Rewards clean profile
2. Visit an unverified site and ensure place in publisher_info_db
3. Quit Brave and modify site value in publisher_list to verified
4. Restart Brave and go to site modified above

Actual result:

Site still shows as unverified

Expected result:

Site should show verified

Reproduces how often:

100%

Brave version (brave://version info)

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?

Website problems only:

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

Additional Information

[NejcZdovc]

blocked on #4025 and #3953

[LaurenWags]

Verified passed with

Brave	0.65.98 Chromium: 74.0.3729.131 (Official Build) beta(64-bit)
Revision	518a41c1fa7ce1c8bb5e22346e82e42b4d76a96f-refs/branch-heads/3729@{#954}
OS	Mac OS X

• Verified test plan from Get verified state from the list brave-core#2078
• Also verified test plan steps using both YouTube and Twitch channels. When YT and Twitch channels are not verified, the generic YT or Twitch icon was used as appropriate (both the site specific favicon and verified icons no longer displayed on brave://rewards or panel).

Verification passed on

Brave	0.65.107 Chromium: 75.0.3770.38 (Official Build) beta (64-bit)
Revision	3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS	Windows 10 OS Version 1803 (Build 17134.523)

• Verified test plan from Get verified state from the list brave-core#2078
  used rewards staging server

Verification passed on

Brave	0.65.107 Chromium: 75.0.3770.38 (Official Build) beta (64-bit)
Revision	3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS	Linux

• Verified test plan from Get verified state from the list brave-core#2078