chore(core): upgrade example gradle (#12883)

* chore(core): upgrade example gradle

* update

---------

Co-authored-by: Guillaume Bernos <[email protected]>

Author: TarekkMA

packages/firebase_core/firebase_core/example/android/.gitignore

@@ -5,3 +5,9 @@ gradle-wrapper.jar
 /gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

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

@@ -1,55 +1,60 @@
 plugins {
     id "com.android.application"
+    // START: FlutterFire Configuration
+    id 'com.google.gms.google-services'
+    // END: FlutterFire Configuration
+    id "kotlin-android"
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id "dev.flutter.flutter-gradle-plugin"
 }
 
 def localProperties = new Properties()
-def localPropertiesFile = rootProject.file('local.properties')
+def localPropertiesFile = rootProject.file("local.properties")
 if (localPropertiesFile.exists()) {
-  localPropertiesFile.withReader('UTF-8') { reader ->
-    localProperties.load(reader)
-  }
+    localPropertiesFile.withReader("UTF-8") { reader ->
+        localProperties.load(reader)
+    }
 }
 
-def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+def flutterVersionCode = localProperties.getProperty("flutter.versionCode")
 if (flutterVersionCode == null) {
-  flutterVersionCode = '1'
+    flutterVersionCode = "1"
 }
 
-def flutterVersionName = localProperties.getProperty('flutter.versionName')
+def flutterVersionName = localProperties.getProperty("flutter.versionName")
 if (flutterVersionName == null) {
-  flutterVersionName = '1.0'
+    flutterVersionName = "1.0"
 }
 
 android {
-  namespace 'io.flutter.plugins.firebasecoreexample'
-
-  compileSdk flutter.compileSdkVersion
-
-  defaultConfig {
-    applicationId "io.flutter.plugins.firebasecoreexample"
-    minSdkVersion flutter.minSdkVersion
-    targetSdk flutter.targetSdkVersion
-    versionCode flutterVersionCode.toInteger()
-    versionName flutterVersionName
-  }
-
-  compileOptions {
-    sourceCompatibility JavaVersion.VERSION_1_8
-    targetCompatibility JavaVersion.VERSION_1_8
-  }
-
-  buildFeatures {
-    buildConfig = true
-  }
-
-  buildTypes {
-    release {
-      signingConfig signingConfigs.debug
+    namespace = "io.flutter.plugins.firebasecoreexample"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        applicationId = "io.flutter.plugins.firebasecoreexample"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutterVersionCode.toInteger()
+        versionName = flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.debug
+        }
     }
-  }
 }
 
 flutter {
-  source '../..'
+    source = "../.."
 }