fix(core): Reduce serialization log spam

[adinauer]

📜 Description

Add an ISerializer.serialize overload that accepts an enableLogging flag. The default implementation delegates to the existing overload to preserve compatibility with custom serializers, while JsonSerializer honors the flag.

Use the new overload from JsonSerializationUtils.byteSizeOf with logging disabled so byte-size calculations do not emit duplicate Serializing object debug messages.

💡 Motivation and Context

Calculating serialized byte sizes currently causes full objects, including log envelopes, to be written to debug logs. This produces significant log spam even though serialization is only being performed for accounting or size checks.

Resolves #4946
Refs JAVA-261

💚 How did you test it?

• ./gradlew :sentry:test --tests io.sentry.JsonSerializerTest --tests io.sentry.util.JsonSerializationUtilsTest
• ./gradlew :sentry:apiCheck
• ./gradlew spotlessApply apiDump

📝 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.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.

🔮 Next steps

None.

[linear-code]

JAVA-261

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.59.0 (1)	release

⚙️ sentry-android Build Distribution Settings