build: Suppress obsolete Java 8 option warning under JDK 21+

[runningcode]

📜 Description

The root build compiles Java with -Xlint:all -Werror. This PR adds -Xlint:-options to the shared JavaCompile args in build.gradle.kts.

💡 Motivation and Context

The sentry module targets Java 8 (sourceCompatibility/targetCompatibility = 1.8). On JDK 21+, javac flags -source/-target 8 as obsolete:

warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
error: warnings found and -Werror specified

Because the build uses -Werror, that warning becomes a hard error and :sentry:compileJava fails. CI pins Temurin JDK 17 (where the warning does not yet exist), so it never surfaces there — but it breaks any local build or tooling running on a newer JDK. In particular, the Kotlin LSP bundles JDK 25, so its Gradle project import aborts and cross-module / external-library resolution silently stops working.

-Xlint:-options is the exact suppression javac itself recommends when intentionally targeting an older release. It only silences the [options] lint category (obsolete source/target, unset bootstrap classpath) and leaves -Werror in force for everything else.

💚 How did you test it?

Reproduced the failure and confirmed the fix with JDK 25's javac:

• javac -source 8 -target 8 -Xlint:all -Werror ... → fails (exit 1)
• same command with -Xlint:-options added → passes (exit 0)

./gradlew spotlessApply is clean.

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

Longer term, the [options] warning points at the cleaner fix of switching from -source/-target 8 to --release 8 (which also sets the bootstrap classpath), but that is a broader change deferred to a follow-up.

#skip-changelog

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.46.0 (1)	release

⚙️ sentry-android Build Distribution Settings