Brave.P3A.SentAnswersCount defaults to highest value

[LaurenWags]

Description

Found while testing #6285

While testing P3A on a clean profile, I noticed that Brave.P3A.SentAnswersCount defaults to 3 (which is the highest value) in local state. Per discussion with @iefremov this is a bug.

Steps to Reproduce

1. Launch 1.1.x with clean profile.
2. Navigate to brave://local state.

Actual result:

see something like this

         "Brave.P3A.SentAnswersCount": {
            "sent": false,
            "value": "3"
         },

3 corresponds to a response of 10 or more per stats

Expected result:

I'd expect it to default to the lowest value

Reproduces how often:

easily

Brave version (brave://version info)

Brave	1.1.18 Chromium: 79.0.3945.56 (Official Build) (64-bit)
Revision	73cc6bf591f792b99f8fc7cdfb8addedbd084bf8-refs/branch-heads/3945@{#788}
OS	macOS Version 10.13.6 (Build 17G5019)

Version/Channel Information:

• Can you reproduce this issue with the current release? n/a
• Can you reproduce this issue with the beta channel? unsure
• Can you reproduce this issue with the dev channel? unsure
• Can you reproduce this issue with the nightly channel? unsure

Other Additional Information:

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

Miscellaneous Information:

cc @iefremov @bsclifton @brave/legacy_qa

[bsclifton]

Fixed with brave/brave-core#4145

(specifically, 1.1 was fixed with brave/brave-core@1be2459)

[LaurenWags]

Per discussion with @iefremov and @bsclifton since this issue is still occurring in 1.1.x, logged a follow up issue, #7306, and marking this one as QA/No.