Add auto init from JS tests for Android

[krystofwoldrich]

Description

@krystofwoldrich Initially tried to add the auto tests in https://github.com/getsentry/sentry-react-native/pull/4602 but this PR got stale.

Feature branch in https://github.com/getsentry/sentry-react-native/pull/4472 currently contains only manual tests for the android sample. Tests for automatic init require different build of the application which will have manual native init disabled. This can be done using build config. Compared to iOS this can't be done by launchArgs (intent arguments) because these are not available before an activity is launched.