push notification services

src/Android/Push/FirebaseInstanceIdService.cs

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+#if !FDROID
+using Android.App;
+using Android.Content;
+using Bit.App.Abstractions;
+using Bit.Core;
+using Bit.Core.Abstractions;
+using Bit.Core.Utilities;
+using Firebase.Iid;
+
+namespace Bit.Droid.Push
+{
+    [Service]
+    [IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })]
+    public class FirebaseInstanceIdService : Firebase.Iid.FirebaseInstanceIdService
+    {
+        public override void OnTokenRefresh()
+        {
+            var storageService = ServiceContainer.Resolve<IStorageService>("storageService");
+            var pushNotificationService = ServiceContainer.Resolve<IPushNotificationService>("pushNotificationService");
+            storageService.SaveAsync(Constants.PushRegisteredTokenKey, FirebaseInstanceId.Instance.Token);
+            pushNotificationService.RegisterAsync();
+        }
+    }
+}
+#endif

src/Android/Push/FirebaseMessagingService.cs

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+#if !FDROID
+using Android.App;
+using Android.Content;
+using Bit.App.Abstractions;
+using Bit.Core.Utilities;
+using Firebase.Messaging;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using Xamarin.Forms;
+
+namespace Bit.Droid.Push
+{
+    [Service]
+    [IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
+    public class FirebaseMessagingService : Firebase.Messaging.FirebaseMessagingService
+    {
+        public override void OnMessageReceived(RemoteMessage message)
+        {
+            if(message?.Data == null)
+            {
+                return;
+            }
+            var data = message.Data.ContainsKey("data") ? message.Data["data"] : null;
+            if(data == null)
+            {
+                return;
+            }
+            try
+            {
+                var obj = JObject.Parse(data);
+                var listener = ServiceContainer.Resolve<IPushNotificationListenerService>(
+                    "pushNotificationListenerService");
+                listener.OnMessageAsync(obj, Device.Android);
+            }
+            catch(JsonReaderException ex)
+            {
+                System.Diagnostics.Debug.WriteLine(ex.ToString());
+            }
+        }
+    }
+}
+#endif