publisher list should go into retries

[LaurenWags]

Description

Per discussion with @NejcZdovc , if publisher list cannot be loaded for any reason, it should go into retries.

Steps to Reproduce

1. Clean profile, enable Rewards.
2. Visit a verified site (brave.com) for min time.
3. Open a new tab. Close brave.com.
4. Navigate to rewards page, make sure site is recorded in ac table.
5. Close brave.
6. Delete publisher_list from profile folder.
7. Launch Brave
8. Navigate to another verified site (like DDG) for min time.
9. Open panel, site does not show as verified.
10. Open a new tab.
11. Navigate to Rewards page.
12. Site is listed in a-c table but is not verified.
13. Open a new tab, navigate to brave.com for min time.
14. Navigate to Brave Rewards page.
15. brave.com no longer shows as verified.

Actual result:

publisher list could not be reached (in this case it did not exist), so all sites showed as unverified.

Expected result:

since publisher list could not be reached, it should have gone into retries and refetched from server.

Reproduces how often:

easily

Brave version (brave://version info)

Brave	0.60.48 Chromium: 72.0.3626.121 (Official Build) (64-bit)
Revision	da3787ba355f18db7db52abf75c42afb408d656f-refs/branch-heads/3626@{#883}
OS	Mac OS X

Reproducible on current release:

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

Website problems only:

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

Additional Information

[GeetaSarvadnya]

Verification passed on

Brave	0.62.49 Chromium: 73.0.3683.86 (Official Build) (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Windows 10 OS Build 17134.523

• Verified the test plan from Fixes publisher list re-try logic brave-core#1906
• Verified the STR from description

Verification passed on

Brave	0.62.49 Chromium: 73.0.3683.86 (Official Build) (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Linux

• Verified the test plan from Fixes publisher list re-try logic brave-core#1906
• Verified the STR from description

Verified passed with

Brave	0.62.49 Chromium: 73.0.3683.86 (Official Build) (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Mac OS X

• Verified STR from the description
• Verified test plan from Fixes publisher list re-try logic brave-core#1906