Smallest change required to support host apps using agp 8.0 (#125657)

Testing AGP 8.0 is not possible with the existing infra because of the java version on CI machines. See https://github.com/flutter/flutter/issues/125325 for more details.

https://github.com/flutter/flutter/issues/125181

packages/integration_test/android/build.gradle

@@ -26,6 +26,10 @@ rootProject.allprojects {
 apply plugin: 'com.android.library'
 
 android {
+    // Conditional for compatibility with AGP <4.2.
+    if (project.android.hasProperty("namespace")) {
+        namespace 'dev.flutter.integration_test'
+    }
     compileSdkVersion 31
 
     compileOptions {

packages/integration_test/example/android/app/build.gradle

@@ -29,6 +29,10 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
+    // Conditional for compatibility with AGP <4.2.
+    if (project.android.hasProperty("namespace")) {
+        namespace 'com.example.integration_test_example'
+    }
     compileSdkVersion flutter.compileSdkVersion
 
     compileOptions {