[Telemetry] ETP setting

[vesta0]

Description & Product Manager / Data Scientist User Story

As a product manager, I want to know which ETP setting our users prefer so we can better optimize their default privacy settings.

What questions will you answer with this data?

-What percentage of users currently have standard vs strict vs custom ETP on?
-How often and what percentage of users change their ETP setting?

Note: I think we need to track ETP setting as a state + add "custom" as a category under the existing "tracking_protection.etp_setting_changed" probe

Acceptance Criteria

• ENG files a DS JIRA request outlining their methodology.
• DS sign off on instrumentation methodology addressing product questions.
• Event pings can be queried via re:dash
• Event pings can be queried via amplitude
• We are sending telemetry events for the actions listed in the requirements
• We have documented the telemetry
• We have asked a data steward to review the telemetry

┆Issue is synchronized with this Jira Task

[vesta0]

Proposal doc here

[sblatz]

The bulk of this request is already handled by #11211. I will add custom to the etp_setting_changed probe :)

[AndiAJ]

Hi, verified as fixed on the latest Nightly Build 200611 from 6/11 using a Google Pixel 3a (Android 10)

✔️ State of the toggle - Ping 361817c1-d156-4005-902b-347ac32a146a

"category": "events",
          "extra": {
            "enabled": "pref_key_tracking_protection",
            "preference_key": "true"
          },
          "name": "preference_toggled"

✔️ Switch to Strict - Ping ea7b4777-e528-4572-af2a-79fac401c217

{
        "category": "tracking_protection",
        "extra": {
          "etp_setting": "STRICT"
        },
        "name": "etp_setting_changed"

✔️ Metrics with Strict- Ping dfad8b10-afcc-4b9e-95aa-5d2c1fc2cba3

"preferences.tracking_protection": [
            "strict"
          ]

✔️ Switch to Standard - Ping d737bb2e-d155-459f-a38d-8d0bdc5589c9

{
          "category": "tracking_protection",
          "extra": {
            "etp_setting": "STANDARD"
          },
          "name": "etp_setting_changed"

✔️ Metrics with Standard - Ping 70c39e57-a206-48a6-98b7-cc2ec6748140

"preferences.tracking_protection": [
            "standard"

✔️ Switch to Custom - Ping 616a0eb3-2d29-4196-a599-26a843e12103

{
          "category": "tracking_protection",
          "extra": {
            "etp_setting": "CUSTOM"
          }

✔️ Metrics with Custom - Ping 72547367-3af8-4f61-9918-91ab657684f3

"preferences.tracking_protection": [
            "custom"
          ]

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