Bug 1862737 - Add telemetry for the full install referrer response

app/metrics.yaml

@@ -7489,6 +7489,25 @@ first_session:
         - Performance
         - Attribution
 play_store_attribution:
+  install_referrer_response:
+    type: text
+    send_in_pings:
+      - first-session
+    description: |
+      The full install referrer response.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1862737
+    data_reviews:
+      - https://github.com/mozilla-mobile/firefox-android/pull/4343
+    data_sensitivity:
+      # - technical
+      - web_activity # This is a workaround so we can use Text type for technical data.
+    notification_emails:
+      - android-probes@mozilla.com
+    expires: never
+    metadata:
+      tags:
+        - Attribution
   source:
     type: string
     send_in_pings:

app/src/main/java/org/mozilla/fenix/components/metrics/InstallReferrerMetricsService.kt

@@ -57,6 +57,8 @@ class InstallReferrerMetricsService(private val context: Context) : MetricsServi
                                 return
                             }
 
+                            PlayStoreAttribution.installReferrerResponse.set(installReferrerResponse)
+
                             val utmParams = UTMParams.parseUTMParameters(installReferrerResponse)
                             if (FeatureFlags.metaAttributionEnabled) {
                                 MetaParams.extractMetaAttribution(utmParams.content)
@@ -135,11 +137,11 @@ data class UTMParams(
         const val UTM_TERM = "utm_term"
 
         /**
-         * Try and unpack the referrer URL by successively URLDecoding the URL.
+         * Try and unpack the install referrer response.
          */
-        fun parseUTMParameters(referrerUrl: String): UTMParams {
+        fun parseUTMParameters(installReferrerResponse: String): UTMParams {
             val utmParams = mutableMapOf<String, String>()
-            val params = referrerUrl.split("&")
+            val params = installReferrerResponse.split("&")
 
             for (param in params) {
                 val keyValue = param.split("=")