Add sample

samples/Sentry.Samples.Android/MainActivity.cs

@@ -23,10 +23,12 @@ protected override void OnCreate(Bundle? savedInstanceState)
 
             options.SetBeforeSend(evt =>
             {
-                if (evt.Exception?.Message.Contains("Something you don't care about?") ?? false)
+                if (evt.Exception?.Message.Contains("Something you don't care want logged?") ?? false)
                 {
                     return null; // return null to filter out event
                 }
+                // or add additional data
+                evt.SetTag("dotnet-Android-Native-Before", "Hello World");
                 return evt;
             });
         });