Usage ping opt out doesn't work

[fmarier]

We have a settings (default OFF) which claims to control both usage pings and crash reports:

However, requests to the stats endpoint (laptop-updates.brave.com) still take place despite this setting being turned off.

We should:

• Ensure crash report setting only applies to crash reports.

Related issues:

• Update the label to make it clear that this toggle is just for crash reports (and update screenshot on our support page) Move security and privacy higher in brave://settings #16470
• Add a separate opt out for usage pings Add pref for disabling stats ping #16583

[fmarier]

There is also an issue open around improving the presentation of our various opt-outs in settings: #14269

[karenkliu]

(Refer to #14269 for the updated crash reporting text)

[kkuehlz]

#16583 for creating the pref in local state

[rebron]

@keur Is this resolved with this fix? #16583

[kkuehlz]

Yep, and this is the PR. At first we weren't going to batch the UI with the logic change, but we ended up doing it. Forgot to update the issue. Closing brave/brave-core#9229