[ANDROID] Allow using a custom RNCWebView in New Architecture

[marco-saia-datadog]

What does this PR do?

Adds a createViewInstance override to RNCWebViewManager in new architecture, to allow using a custom RNCWebView, in accordance with the official guide for Android Customization.

Usage

With this change, the official guide will still be relevant:

@ReactModule(name = CustomWebViewManager.REACT_CLASS)
public class CustomWebViewManager extends RNCWebViewManager {
  /* This name must match what we're referring to in JS */
  protected static final String REACT_CLASS = "RCTCustomWebView";

  protected static class CustomWebViewClient extends RNCWebViewClient { }

  protected static class CustomWebView extends RNCWebView {
    public CustomWebView(ThemedReactContext reactContext) {
      super(reactContext);
    }
  }

  // This is currently not possible in New Architecture
  @Override
  protected RNCWebView createViewInstance(ThemedReactContext reactContext) {
    return super.createViewInstance(reactContext, new CustomWebView(reactContext));
  }

  @Override
  public String getName() {
    return REACT_CLASS;
  }

  @Override
  protected void addEventEmitters(ThemedReactContext reactContext, RNCWebViewWrapper view) {
    view.getWebView().setWebViewClient(new CustomWebViewClient());
  }
}

[marco-saia-datadog]

⬆️ Friendly bump :)

[github-actions]

Hello 👋, this PR has been opened for more than 2 months with no activity on it. If you think this is a mistake please comment and ping a maintainer to get this merged ASAP! Thanks for contributing! You have 7 days until this gets closed automatically

[believer]

This PR is still relevant. We've patched it in and custom views are working for us with it. When you have time, please have a look @Titozzz or @jamonholmgren.