fdroid builds without Google and Hockey services

src/App/Services/NoopPushNotificationService.cs

@@ -0,0 +1,17 @@
+using Bit.App.Abstractions;
+
+namespace Bit.App.Services
+{
+    public class NoopPushNotificationService : IPushNotificationService
+    {
+        public string Token => null;
+
+        public void Register()
+        {
+        }
+
+        public void Unregister()
+        {
+        }
+    }
+}