a-c table not being updated correctly - follow up to 2882

[LaurenWags]

Description

Follow up to #2882

While testing above issue, found that if you visited a site in Dec 2018 (eg. DDG) and then again in 2019, your table still lists DDG twice. However, the % values in the table all add up to 100%.

Steps to Reproduce

1. Have a rewards profile from Dec 2018 with some data in it
2. Launch Brave with that profile in Jan 2019 (using 0.58.18)
3. Visit some sites (one not in the list already and one in the list already)
4. View A-C table
5. % values started over at 100% for these two recently visited sites
6. Close Brave, swap out .app file to be 0.58.21
7. Visit one of the sites again.
8. Go back to A-C table.
9. All percentage values are back to normal (all add up to 100%) but the site which was already in the table is listed twice still.

Actual result:

Site is listed twice

Expected result:

Site only listed once

Reproduces how often:

easily

Brave version (brave://version info)

Brave	0.58.21 Chromium: 71.0.3578.98 (Official Build) (64-bit)
Revision	15234034d19b85dcd9a03b164ae89d04145d8368-refs/branch-heads/3578@{#897}
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

[NejcZdovc]

this one is currently blocked as we need to decide what we would like to do with monthly reports

[LaurenWags]

Verified passed with

Brave	0.63.14 Chromium: 73.0.3683.75 (Official Build) dev(64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Mac OS X

• Verified test plan from Removes month and year from activity_info table brave-core#1760
• Encountered verified sites not showing correct favicon in panel - follow up to 3525 #3783 while testing

Verification passed on

Brave	0.63.14 Chromium: 73.0.3683.75 (Official Build) dev (64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Windows 10 OS Build 17134.523

Used test plan from brave/brave-core#1760
Also tested excluding and including of site in a-c table

Verification passed on

Brave	0.63.20 Chromium: 73.0.3683.75 (Official Build) dev (64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Linux

• Verification passed from test plan
• Verified by excluding and including site from a-c table