Disable session tracking in SDK initialization (#4341)

* Disable auto session tracking in Android and Cocoa platform SDKs

Co-authored-by: bruno <bruno@sentry.io>

* Fix double session reporting on mobile platforms

Co-authored-by: bruno <bruno@sentry.io>

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: bruno-garcia

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 ### Fixes
 
+- Avoid double reporting sessions on iOS and Android apps ([#4341](https://github.com/getsentry/sentry-dotnet/pull/4341))
 - Sentry now decompresses Request bodies in ASP.NET Core when RequestDecompression middleware is enabled ([#4315](https://github.com/getsentry/sentry-dotnet/pull/4315))
 - Custom ISentryEventProcessors are now run for native iOS events ([#4318](https://github.com/getsentry/sentry-dotnet/pull/4318))
 - Crontab validation when capturing checkins ([#4314](https://github.com/getsentry/sentry-dotnet/pull/4314))

src/Sentry/Platforms/Android/SentrySdk.cs

@@ -47,7 +47,8 @@ private static void InitSentryAndroidSdk(SentryOptions options)
             o.DiagnosticLevel = options.DiagnosticLevel.ToJavaSentryLevel();
             o.Dist = options.Distribution;
             o.Dsn = options.Dsn;
-            o.EnableAutoSessionTracking = options.AutoSessionTracking;
+            // Hardcode to false because .NET SDK manages sessions itself
+            o.EnableAutoSessionTracking = false;
             o.Environment = options.Environment;
             o.FlushTimeoutMillis = (long)options.InitCacheFlushTimeout.TotalMilliseconds;
             o.MaxAttachmentSize = options.MaxAttachmentSize;

src/Sentry/Platforms/Cocoa/SentrySdk.cs

@@ -24,7 +24,8 @@ private static void InitSentryCocoaSdk(SentryOptions options)
         nativeOptions.Debug = options.Debug;
         nativeOptions.DiagnosticLevel = options.DiagnosticLevel.ToCocoaSentryLevel();
         nativeOptions.Dsn = options.Dsn;
-        nativeOptions.EnableAutoSessionTracking = options.AutoSessionTracking;
+        // Hardcode to false because .NET SDK manages sessions itself
+        nativeOptions.EnableAutoSessionTracking = false;
         nativeOptions.EnableCaptureFailedRequests = options.CaptureFailedRequests;
         nativeOptions.FailedRequestStatusCodes = GetFailedRequestStatusCodes(options.FailedRequestStatusCodes);
         nativeOptions.MaxAttachmentSize = (nuint)options.MaxAttachmentSize;