Bug 1823492 - Add timespan metric for Adjust attribution

app/metrics.yaml

@@ -7256,6 +7256,28 @@ first_session:
       tags:
         - Performance
         - Attribution
+  adjust_attribution_timespan:
+    type: timespan
+    time_unit: millisecond
+    send_in_pings:
+      - first-session
+      - metrics
+    description: >
+      The time that it takes to derive the attribution parameters by
+      the Adjust SDK.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1823492
+    data_reviews:
+      - https://github.com/mozilla-mobile/firefox-android/pull/2974
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - android-probes@mozilla.com
+    expires: 124
+    metadata:
+      tags:
+        - Performance
+        - Attribution
 play_store_attribution:
   source:
     type: string

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

@@ -51,8 +51,13 @@ class AdjustMetricsService(
 
         val installationPing = FirstSessionPing(application)
 
+        FirstSession.adjustAttributionTimespan.start()
         val timerId = FirstSession.adjustAttributionTime.start()
         config.setOnAttributionChangedListener {
+            if (!installationPing.wasAlreadyTriggered()) {
+                FirstSession.adjustAttributionTimespan.stop()
+            }
+
             FirstSession.adjustAttributionTime.stopAndAccumulate(timerId)
             if (!it.network.isNullOrEmpty()) {
                 application.applicationContext.settings().adjustNetwork =
@@ -81,6 +86,7 @@ class AdjustMetricsService(
     }
 
     override fun stop() {
+        FirstSession.adjustAttributionTimespan.cancel()
         Adjust.setEnabled(false)
         Adjust.gdprForgetMe(application.applicationContext)
     }

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

@@ -35,7 +35,6 @@ class FirstSessionPing(private val context: Context) {
      *
      * @return true if it was already triggered, false otherwise.
      */
-    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
     internal fun wasAlreadyTriggered(): Boolean {
         return prefs.getBoolean("ping_sent", false)
     }