fix(android): Keep scheme of deep links on cold start

[Gustl22]

Fixes flutter/flutter#100624

I suspect the old behavior was copied from Flutter back then.

See: https://github.com/flutter/flutter/blob/ae74cd8021191cdf60d2e8a9636cd76163c4a6e5/engine/src/flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java#L555

I also wonder, if there's a better way instead of replicating the Activity logic of Flutter, e.g. just reuse flutters engine instance?

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