Can't use withCompositionRoot in a project with AndroidViewRenderings

[wardellbagby]

Sample repro: https://github.com/wardellbagby/WithCompositionRootCrash

When using withCompositionRoot in order to establish a Composable that should wrap
all composeViewFactories, along with renderings that implement AndroidViewRendering, the app
will crash when attempting to find a ViewFactory to render an AndroidViewRendering.

The root cause of this issue is how the logic to wrap ViewFactories is implemented. It relies
on ViewRegistry.getFactoryFor to return a valid view factory for every rendering class, but the
logic to return a ViewFactory for an AndroidViewRendering is based on a rendering instance,
not a rendering class. The logic that takes AndroidViewRendering's instances into account is done
by ViewRegistry.getFactoryForRendering, which is what ViewRegistry.buildView uses.

[rjrjr]

This should be fixed under #199, via ScreenViewFactoryFinder