Brave.P3A.SentAnswersCount defaults to highest value - follow up to 7261

[LaurenWags]

Description

Follow up to #7261

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)

1.1.20

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

[LaurenWags]

Verified passed with

Brave	1.2.29 Chromium: 79.0.3945.79 (Official Build) beta (64-bit)
Revision	29f75ce3f42b007bd80361b0dfcfee3a13ff90b8-refs/branch-heads/3945@{#916}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified STR from description:

• Also launched a clean profile with flags from Privacy Preserving Product Analytics (P3A) #6285 for P3A testing. Waited a few minutes and refreshed brave://local-state. Confirmed that the value for Brave.P3A.SentAnswersCount updated:

Verification passed on

Brave	1.2.29 Chromium: 79.0.3945.79 (Official Build) beta (64-bit)
Revision	29f75ce3f42b007bd80361b0dfcfee3a13ff90b8-refs/branch-heads/3945@{#916}
OS	Ubuntu 18.04 LTS

Verified test plan from the description

Verified that the value is being changed after sending the p3a.

Verification passed on

Brave	1.2.35 Chromium: 79.0.3945.88 (Official Build) beta (64-bit)
Revision	c2a58a36b9411c80829b4b154bfcab97e581f1f3-refs/branch-heads/3945@{#954}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified test plan from the description