Investigate referral code being added from the playstore install

Description

Historically we’ve accepted that referral codes do not get captured from our google paid digital advertising into our internal analytics system. More specifically we are missing out on referral data from the Google Playstore install, we’d like to investigate the reason for this because it looks like we have the proper code in place getInstallReferrer() to extract this data.

A couple places to leading thoughts:

• Is the referral code captured and added to the usage ping before the user sends their first usage ping?
• Is there any other information in the getInstallReferrer response that we can use? (campaign name, id, ref url)?
• We are calling getInstallReferrer()docs. Is this being called at the correct time and added to the users local-state so that it is included in the usage ping? And does it persist for 90 days?
• Is referral link being passed through to install and do we have a valid refcodes in campaign setups, format XXX123? ?

cc @anthonypkeane @laurentiugruia

Issue reproduces how often

• Seems to be almost all the time

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version? Yes
• Can you reproduce this issue with the current Play Store Beta version? Yes
• Can you reproduce this issue with the current Play Store Nightly version? Yes

Device details

• All android core it seems

[samartnik]

Test plan: Case 1:

1. Install brave browser from the GPS ad (contact @porteron on how to do it).
2. Goto brave://local-state.
3. Make sure that ref code there is UAC001.

Case 2:

1. Install brave browser from the GPS (just a regular install).
2. Goto brave://local-state.
3. Make sure that ref code there is BRV001.

Case 3:

1. Install brave browser from the referral link.
2. Goto brave://local-state.
3. Make sure there is appropriate ref code.

[kjozwiak]

Verification PASSED on Pixel 6 running Android 13 using the following build(s):

Brave | 1.44.110 Chromium: 106.0.5249.103 (Official Build) (64-bit)
--- | ---
Revision | 182570408a1f25ab2731ef5f283b918df9b9f956-refs/branch-heads/5249_91@{#6}
OS | Android 13; Build/T1B2.220916.004

Test Case #1

As per https://github.com/brave/brave-browser/issues/25265#issuecomment-1267633910, this was verified on BETA as per https://github.com/brave/brave-browser/issues/25265#issuecomment-1269051612.

Test Case #2

• downloaded/installed Brave Browser from GPS via the internal test channel
• launched Brave and ensured that "promo_code": "BRV001" via brave://local-state

"referral": {
         "initialization": true,
         "promo_code": "BRV001"

Test Case #3

• opened https://kjozwiak.github.io via Chrome and clicked on Production GPS WWK708
• downloaded/installed Brave Browser from GPS
• launched Brave and ensured that "promo_code": "WWK708" via brave://local-state

"referral": {
         "download_id": "59b8c2a2-f697-4ea0-b5ce-cac0badfb7ce",
         "initialization": true,
         "promo_code": "WWK708"
      },

---

Verification PASSED on Samsung Tab S8 Ultra running Android 12 using the following build(s):

Because of https://github.com/brave/brave-browser/issues/25931, used the apk method on the tablet.

Brave | 1.44.112 Chromium: 106.0.5249.119 (Official Build) (32-bit)
--- | ---
Revision | 9f2101830b56fd2ea1408287f6c74e253ebcb7c6-refs/branch-heads/5249@{#797}
OS | Android 12; Build/SP2A.220305.013

Test Case #1

As per https://github.com/brave/brave-browser/issues/25265#issuecomment-1267633910, this was verified on BETA as per https://github.com/brave/brave-browser/issues/25265#issuecomment-1269051612.

Test Case #2

• downloaded/installed Brave Browser via the APK
• launched Brave and ensured that "promo_code": "BRV001" via brave://local-state

"referral": {
         "initialization": true,
         "promo_code": "BRV001"

Test Case #3

• opened https://kjozwiak.github.io via Chrome and clicked on Production GPS WWK708
• once the GPS opened, installed 1.44.112 Chromium: 106.0.5249.119 via the APK
• clicked on Open via GPS
• launched Brave and ensured that "promo_code": "WWK708" via brave://local-state

},
      "referral": {
         "download_id": "fb3efed4-7e38-4978-941e-a801f62ff164",
         "initialization": true,
         "promo_code": "WWK708"
      },