chore(deps): update Java SDK to v8.20.0

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Bumps modules/sentry-java from 8.19.1 to 8.20.0.

Auto-generated by a dependency updater.

Changelog

8.20.0

Fixes

• Do not use named capturing groups for regular expressions (#4652)
  • This fixes a crash on Android versions below 8.0 (API level 26)

Features

• Add onDiscard to enable users to track the type and amount of data discarded before reaching Sentry (#4612)
  • Stub for setting the callback on Sentry.init:

    Sentry.init(options -> {
      ...
      options.setOnDiscard(
       (reason, category, number) -> {
         // Your logic to process discarded data
       });
    });