[Sample] Updated test ad unit id for Android inline adaptive banner (#1119)

* Updated ad id for banner sample

* Updated android only

---------

Co-authored-by: Justin Malandruccolo <jmalandruccolo@google.com>

Author: malandr2

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

@@ -25,7 +25,7 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 33
+    compileSdkVersion 34
 
     namespace 'io.flutter.plugins.googlemobileadsexample'
 
@@ -36,7 +36,7 @@ android {
     defaultConfig {
         applicationId "io.flutter.plugins.googlemobileadsexample"
         minSdkVersion 21
-        targetSdkVersion 33
+        targetSdkVersion 34
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

packages/google_mobile_ads/example/lib/inline_adaptive_example.dart

@@ -14,6 +14,8 @@
 
 // ignore_for_file: public_member_api_docs
 
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
 import 'constants.dart';
@@ -55,7 +57,9 @@ class _InlineAdaptiveExampleState extends State<InlineAdaptiveExample> {
         _adWidth.truncate());
 
     _inlineAdaptiveAd = AdManagerBannerAd(
-      adUnitId: '/6499/example/adaptive-banner',
+      adUnitId: Platform.isAndroid
+          ? '/21775744923/example/banner'
+          : '/6499/example/adaptive-banner',
       sizes: [size],
       request: AdManagerAdRequest(),
       listener: AdManagerBannerAdListener(