Support launching experimental debugger for modern CDP targets (#42302)

Summary:
Pull Request resolved: #42302

Changelog: [Internal][Added] Support launching experimental debugger frontend for CDP targets marked as "modern"

See the definition of "modern" targets in D50967795.

Reviewed By: hoxyq

Differential Revision: D52786332

fbshipit-source-id: 13718e9ddf3ec050049ef7ec9a77f6cf1a7f82ee

packages/dev-middleware/src/middleware/openDebuggerMiddleware.js

@@ -62,7 +62,8 @@ export default function openDebuggerMiddleware({
       const targets = inspectorProxy.getPageDescriptions().filter(
         // Only use targets with better reloading support
         app =>
-          app.title === 'React Native Experimental (Improved Chrome Reloads)',
+          app.title === 'React Native Experimental (Improved Chrome Reloads)' ||
+          app.reactNative.type === 'Modern',
       );
 
       let target;