For #9409: Add app icon to Leanplum push notifications

app/src/main/java/org/mozilla/fenix/push/FirebasePushService.kt

@@ -8,6 +8,7 @@ import android.annotation.SuppressLint
 import com.google.firebase.messaging.RemoteMessage
 import com.google.firebase.messaging.FirebaseMessagingService
 import com.leanplum.LeanplumPushFirebaseMessagingService
+import com.leanplum.LeanplumPushService
 import mozilla.components.concept.push.PushService
 import mozilla.components.lib.push.firebase.AbstractFirebasePushService
 import mozilla.components.feature.push.AutoPushFeature
@@ -43,6 +44,11 @@ import mozilla.components.feature.push.AutoPushFeature
 class FirebasePushService : LeanplumPushFirebaseMessagingService(),
     PushService by AutoPushService {
 
+    override fun onCreate() {
+        LeanplumPushService.setCustomizer(LeanplumNotificationCustomizer())
+        super.onCreate()
+    }
+
     override fun onNewToken(newToken: String) {
         AutoPushService.onNewToken(newToken)
         super.onNewToken(newToken)

app/src/main/java/org/mozilla/fenix/push/LeanplumNotificationCustomizer.kt

@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.push
+
+import android.app.Notification
+import android.os.Bundle
+import androidx.core.app.NotificationCompat
+import com.leanplum.LeanplumPushNotificationCustomizer
+import org.mozilla.fenix.R
+
+/**
+ * Notification customizer for incoming Leanplum push messages.
+ */
+class LeanplumNotificationCustomizer : LeanplumPushNotificationCustomizer {
+    override fun customize(
+        builder: NotificationCompat.Builder,
+        notificationPayload: Bundle?
+    ) {
+        builder.setSmallIcon(R.drawable.ic_status_logo)
+    }
+
+    // Do not implement if unless we want to support 2 lines of text in the BigPicture style.
+    // See: https://docs.leanplum.com/docs/customize-your-push-notifications-sample-android
+    override fun customize(
+        builder: Notification.Builder?,
+        notificationPayload: Bundle?,
+        notificationStyle: Notification.Style?
+    ) = Unit // no-op
+}