chore(deps): update Java SDK to v6.21.0

[github-actions]

Bumps modules/sentry-java from 6.20.0 to 6.21.0.

Auto-generated by a dependency updater.

Changelog

6.21.0

Features

• Introduce new sentry-android-sqlite integration (#2722)
  • This integration replaces the old androidx.sqlite database instrumentation in the Sentry Android Gradle plugin
  • A new capability to manually instrument your androidx.sqlite databases.
    • You can wrap your custom SupportSQLiteOpenHelper instance into SentrySupportSQLiteOpenHelper(myHelper) if you're not using the Sentry Android Gradle plugin and still benefit from performance auto-instrumentation.
• Add SentryWrapper for Callable and Supplier Interface (#2720)
• Load sentry-debug-meta.properties (#2734)
  • This enables source context for Java
  • For more information on how to enable source context, please refer to #633

Fixes

• Finish WebFlux transaction before popping scope (#2724)
• Use daemon threads for SentryExecutorService (#2747)
  • We started using SentryExecutorService in 6.19.0 which caused the application to hang on shutdown unless Sentry.close() was called. By using daemon threads we no longer block shutdown.
• Use Base64.NO_WRAP to avoid unexpected char errors in Apollo (#2745)
• Don't warn R8 on missing ComposeViewHierarchyExporter class (#2743)