Implement new HostTargetMetadata fields (Android Bridgeless) (#45249)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/45249

Follows D58288489, D58415181.

Implements the remaining `HostTargetMetadata` fields, sent by the debugger on `ReactNativeApplication.metadataUpdated`, on **Android Bridgeless**.

This will be used to display details such as the app name and React Native version in the debugger frontend.

Changelog: [Internal]

Reviewed By: javache

Differential Revision: D59271755

fbshipit-source-id: a2488fed98df0800ec0a611d2317cd40cd809aac

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java

@@ -61,6 +61,7 @@ import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags;
 import com.facebook.react.modules.appearance.AppearanceModule;
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
 import com.facebook.react.modules.core.DeviceEventManagerModule;
+import com.facebook.react.modules.systeminfo.AndroidInfoHelpers;
 import com.facebook.react.runtime.internal.bolts.Task;
 import com.facebook.react.runtime.internal.bolts.TaskCompletionSource;
 import com.facebook.react.turbomodule.core.interfaces.CallInvokerHolder;
@@ -73,6 +74,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
@@ -90,6 +92,7 @@ import kotlin.jvm.functions.Function0;
  *
  * @see <a href="https://github.com/BoltsFramework/Bolts-Android#tasks">Bolts Android</a>
  */
+@DoNotStrip
 @ThreadSafe
 @Nullsafe(Nullsafe.Mode.LOCAL)
 public class ReactHostImpl implements ReactHost {
@@ -498,6 +501,11 @@ public class ReactHostImpl implements ReactHost {
     }
   }
 
+  @DoNotStrip
+  private Map<String, String> getHostMetadata() {
+    return AndroidInfoHelpers.getInspectorHostMetadata(mContext);
+  }
+
   /**
    * Entrypoint to destroy the ReactInstance. If the ReactInstance is reloading, will wait until
    * reload is finished, before destroying.

packages/react-native/ReactAndroid/src/main/jni/react/runtime/jni/JReactHostInspectorTarget.cpp

@@ -88,9 +88,28 @@ void JReactHostInspectorTarget::registerNatives() {
 
 jsinspector_modern::HostTargetMetadata
 JReactHostInspectorTarget::getMetadata() {
-  return {
+  jsinspector_modern::HostTargetMetadata metadata = {
       .integrationName = "Android Bridgeless (ReactHostImpl)",
   };
+
+  if (auto javaReactHostImplStrong = javaReactHostImpl_->get()) {
+    auto javaMetadata = javaReactHostImplStrong->getHostMetadata();
+    auto getMethod = jni::JMap<jstring, jstring>::javaClassLocal()
+                         ->getMethod<jobject(jobject)>("get");
+
+    auto getStringOptional = [&](const std::string& key) {
+      auto result = getMethod(javaMetadata, make_jstring(key).get());
+      return result ? std::optional<std::string>(result->toString())
+                    : std::nullopt;
+    };
+
+    metadata.appIdentifier = getStringOptional("appIdentifier");
+    metadata.deviceName = getStringOptional("deviceName");
+    metadata.platform = getStringOptional("platform");
+    metadata.reactNativeVersion = getStringOptional("reactNativeVersion");
+  }
+
+  return metadata;
 }
 
 void JReactHostInspectorTarget::onReload(const PageReloadRequest& request) {

packages/react-native/ReactAndroid/src/main/jni/react/runtime/jni/JReactHostInspectorTarget.h

@@ -36,6 +36,14 @@ struct JReactHostImpl : public jni::JavaClass<JReactHostImpl> {
             "setPausedInDebuggerMessage");
     method(self(), message ? jni::make_jstring(*message) : nullptr);
   }
+
+  jni::local_ref<jni::JMap<jstring, jstring>> getHostMetadata() const {
+    static auto method =
+        javaClassStatic()
+            ->getMethod<jni::local_ref<jni::JMap<jstring, jstring>>()>(
+                "getHostMetadata");
+    return method(self());
+  }
 };
 
 class JReactHostInspectorTarget