Bug 1871548 - Add telemetry for Open PDF in Fenix

(cherry picked from commit 54e7320d1d77484ee9ce0ac8fccacadfc06a7cfd)

app/metrics.yaml

@@ -376,6 +376,27 @@ events:
     metadata:
       tags:
         - PrivateBrowsing
+  opened_ext_pdf:
+    type: event
+    description: |
+      A user opened a PDF with Fenix from another app
+    extra_keys:
+      referrer_is_fenix:
+        description: |
+          If the PDF was opened from Fenix itself (for example from the Download notification)
+        type: boolean
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1871548
+    data_reviews:
+      - https://github.com/mozilla-mobile/firefox-android/pull/4940
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - android-probes@mozilla.com
+      - mcastelluccio@mozilla.com
+      - calixte@mozilla.com
+      - sylvestre@mozilla.com
+    expires: never
   synced_tab_opened:
     type: event
     description: |

app/src/main/java/org/mozilla/fenix/IntentReceiverActivity.kt

@@ -15,6 +15,7 @@ import mozilla.components.feature.intent.ext.sanitize
 import mozilla.components.feature.intent.processing.IntentProcessor
 import mozilla.components.support.utils.EXTRA_ACTIVITY_REFERRER_CATEGORY
 import mozilla.components.support.utils.EXTRA_ACTIVITY_REFERRER_PACKAGE
+import mozilla.components.support.utils.INTENT_TYPE_PDF
 import mozilla.components.support.utils.ext.getApplicationInfoCompat
 import org.mozilla.fenix.GleanMetrics.Events
 import org.mozilla.fenix.HomeActivity.Companion.PRIVATE_BROWSING_MODE
@@ -73,6 +74,12 @@ class IntentReceiverActivity : Activity() {
 
         addReferrerInformation(intent)
 
+        if (intent.type == INTENT_TYPE_PDF) {
+            val referrerIsFenix =
+                intent.getStringExtra(EXTRA_ACTIVITY_REFERRER_PACKAGE) == this.packageName
+            Events.openedExtPdf.record(Events.OpenedExtPdfExtra(referrerIsFenix))
+        }
+
         val processor = getIntentProcessors(private).firstOrNull { it.process(intent) }
         val intentProcessorType = components.intentProcessors.getType(processor)