Search screens should use BlockProvider and RepositoryProvider to allow for dependency injection for integration tests

[pappes]

e.g.

  @override
  Widget build(BuildContext context) =>
      RepositoryProvider<BaseMovieRepository>.value(
        value: overrideBlocRepository ?? _defaultBlocRepository,
        child: BlocProvider<SearchBloc>(
          create: (_) => SearchBloc(
              movieRepository:
                  overrideBlocRepository ?? _defaultBlocRepository),
          child: const _MMSearchAppView(),
        ),
      );
}