Build is failing after install `google_mobile_ads`

Plugin Version

0.13.0

Steps to Reproduce

1. Install google_mobile_ads using pub get.
2. Execute flutter run.

Expected results: App is running on device

Actual results: Build failed with following error,

Launching lib/main.dart on SM M315F in debug mode...
Note: /home/ubuntu/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/google_mobile_ads-0.13.0/android/src/main/java/io/flutter/plugins/googlemobileads/FlutterAdSize.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
D8: Cannot fit requested classes in a single dex file (# methods: 79184 > 65536)
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: 
The number of method references in a .dex file cannot exceed 64K.
Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html
at com.android.builder.dexing.D8DexArchiveMerger.getExceptionToRethrow(D8DexArchiveMerger.java:132)
at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:119)
at com.android.build.gradle.internal.transforms.DexMergerTransformCallable.call(DexMergerTransformCallable.java:102)
at com.android.build.gradle.internal.tasks.DexMergingTaskRunnable.run(DexMergingTask.kt:432)
at com.android.build.gradle.internal.tasks.Workers$ActionFacade.run(Workers.kt:242)
at org.gradle.workers.internal.AdapterWorkAction.execute(AdapterWorkAction.java:57)
at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:67)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:63)
at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:63)
at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76)
at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:60)
at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$2(DefaultWorkerExecutor.java:200)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:215)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, position: null
at Version.fakeStackEntry(Version_2.1.62.java:0)
at com.android.tools.r8.utils.Y.a(SourceFile:78)
at com.android.tools.r8.D8.run(D8.java:11)
at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:117)
... 36 more
Caused by: com.android.tools.r8.utils.b: Cannot fit requested classes in a single dex file (# methods: 79184 > 65536)
at com.android.tools.r8.utils.T0.error(SourceFile:1)
at com.android.tools.r8.utils.T0.a(SourceFile:2)
at com.android.tools.r8.dex.P.a(SourceFile:740)
at com.android.tools.r8.dex.P$h.a(SourceFile:7)
at com.android.tools.r8.dex.b.a(SourceFile:14)
at com.android.tools.r8.dex.b.b(SourceFile:25)
at com.android.tools.r8.D8.d(D8.java:133)
at com.android.tools.r8.D8.b(D8.java:1)
at com.android.tools.r8.utils.Y.a(SourceFile:36)
... 38 more


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeDexDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: 
     The number of method references in a .dex file cannot exceed 64K.
     Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html

* Try:
 Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 3m 22s
[!] The shrinker may have failed to optimize the Java bytecode.
To disable the shrinker, pass the `--no-shrink` flag to this command.
To learn more, see: https://developer.android.com/studio/build/shrink-code
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

Run flutter analyze and attach any output of that command below. If there are any analysis errors, try resolving them before filing this issue.

NO such error

output of flutter doctor -v

[✓] Flutter (Channel stable, 2.2.1, on Linux, locale en_GB.UTF-8)
    • Flutter version 2.2.1 at /home/ubuntu/snap/flutter/common/flutter
    • Framework revision 02c026b03c (2 weeks ago), 2021-05-27 12:24:44 -0700
    • Engine revision 0fdb562ac8
    • Dart version 2.13.1

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /home/ubuntu/local/android/sdk
    • Platform android-30, build-tools 29.0.2
    • ANDROID_HOME = /home/ubuntu/local/android/sdk
    • Java binary at: /usr/lib/jvm/java-8-openjdk-amd64/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_292-8u292-b10-0ubuntu1~20.04-b10)
    • All Android licenses accepted.

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).

[✓] VS Code (version 1.56.2)
    • VS Code at /usr/share/code
    • Flutter extension version 3.23.0

[✓] Connected device (1 available)
    • SM M315F (mobile) • 100.69.240.127:5555 • android-arm64 • Android 11 (API 30)

[GAGANsinghmsitece]

setting multiDexEnabled true solves the issue.Does having more than 64K references slow down the app?

[GAGANsinghmsitece]

I add following in app/build.gradle

dependencies {
    implementation "androidx.multidex:multidex:2.0.1"
}

and edited Manifest.xml file to have,

<application
        android:name="androidx.multidex.MultiDexApplication" >
    ...
</application>

Still the error persists