Update add to app code to run on modern versions of agp and gradle. (#2330)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-devrel
channel on [Discord].

<!-- Links -->
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md
[CLA]: https://cla.developers.google.com/
[Discord]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md
[Contributors Guide]:
https://github.com/flutter/samples/blob/main/CONTRIBUTING.md

add_to_app/plugin/android_using_plugin/app/build.gradle

@@ -3,11 +3,11 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 33
+    compileSdk 34
     defaultConfig {
         applicationId "dev.flutter.example.androidusingplugin"
-        minSdkVersion 19
-        targetSdkVersion 33
+        minSdkVersion 21
+        targetSdk 34
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -17,19 +17,29 @@ android {
             minifyEnabled false
         }
     }
+    // Remove when #flutter/flutter/issues/150955 is merged to stable.
+    lintOptions {
+        checkReleaseBuilds false
+    }
+    // Keep java and kotlin versions in sync.
     compileOptions {
         sourceCompatibility 1.8
         targetCompatibility 1.8
     }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    namespace 'dev.flutter.example.androidusingplugin'
 }
 
 dependencies {
     implementation project(':flutter')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'androidx.appcompat:appcompat:1.6.1'
-    implementation 'androidx.core:core-ktx:1.10.1'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    implementation 'androidx.core:core-ktx:1.13.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
 }

add_to_app/plugin/android_using_plugin/app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.androidusingplugin">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
         android:name=".MyApplication"

add_to_app/plugin/android_using_plugin/build.gradle

@@ -7,7 +7,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath 'com.android.tools.build:gradle:8.3.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

add_to_app/plugin/android_using_plugin/gradle.properties

@@ -19,3 +19,5 @@ android.useAndroidX=true
 android.enableJetifier=true
 # Kotlin code style for this project: "official" or "obsolete":
 kotlin.code.style=official
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false

add_to_app/plugin/android_using_plugin/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists