[package_info] Register IntegrationTestPlugin in the example app. (#3478)

This change registers the IntegrationTestPlugin in the example app, so test results are correctly reported back to FTL.

The end-to-end firebase tests for package_info haven't passed in a while (nor have been reported as broken before), but after this change, they start passing again.

Author: ditman

packages/package_info/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.3+4
+
+* Ensure `IntegrationTestPlugin` is registered in `example` app, so Firebase Test Lab tests report test results correctly. [Issue](https://github.com/flutter/flutter/issues/74944).
+
 ## 0.4.3+3
 
 * Update Flutter SDK constraint.

packages/package_info/example/android/app/src/main/java/io/flutter/plugins/packageinfoexample/EmbedderV1Activity.java

@@ -5,6 +5,7 @@
 package io.flutter.plugins.packageinfoexample;
 
 import android.os.Bundle;
+import dev.flutter.plugins.integration_test.IntegrationTestPlugin;
 import io.flutter.app.FlutterActivity;
 import io.flutter.plugins.packageinfo.PackageInfoPlugin;
 
@@ -14,5 +15,7 @@ protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     PackageInfoPlugin.registerWith(
         registrarFor("io.flutter.plugins.packageinfo.PackageInfoPlugin"));
+    IntegrationTestPlugin.registerWith(
+        registrarFor("dev.flutter.plugins.integration_test.IntegrationTestPlugin"));
   }
 }

packages/package_info/pubspec.yaml

@@ -5,7 +5,7 @@ homepage: https://github.com/flutter/plugins/tree/master/packages/package_info
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.3+3
+version: 0.4.3+4
 
 flutter:
   plugin: