Timber should only add a new package and not replace the whole sdk metadata

[marandaneto]

https://github.com/getsentry/sentry-java/blob/main/sentry-android-timber/src/main/java/io/sentry/android/timber/SentryTimberIntegration.kt#L47-L51

Similar to getsentry/sentry-dart#725

So we know if an event was captured using Timber by the packages and logger attribute.
The sdk package still remains the Android one since it's the installed package.