[Bug]: Execution failed for task ':onesignal_flutter:compileReleaseJavaWithJavac'.

[fabioselau077]

What happened?

After run flutter build appbundle --target-platform android-arm,android-arm64,android-x64 -t lib/main.dart
return this:
error 'error: lambda expressions are not supported in -source 7 OneSignal.getNotifications().requestPermission(fallback, Continue.with(permissionResult -> { ^ (use -source 8 or higher to enable lambda expressions)'

Steps to reproduce?

1. onesignal_flutter: ^5.0.3

What did you expect to happen?

Build app appbundle

OneSignal Flutter SDK version

5.0.3

Which platform(s) are affected?

• iOS
• Android

Relevant log output

/Users/fabio/.pub-cache/hosted/pub.dev/onesignal_flutter-5.0.4/android/src/main/java/com/onesignal/flutter/OneSignalNotifications.java:81: error: lambda expressions are not supported in -source 7
        OneSignal.getNotifications().requestPermission(fallback, Continue.with(permissionResult -> {
                                                                                                ^
  (use -source 8 or higher to enable lambda expressions)
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':onesignal_flutter:compileReleaseJavaWithJavac'.

Code of Conduct

• I agree to follow this project's Code of Conduct

[fabioselau077]

Resolved.
In android/build.gradle change classpath 'com.android.tools.build:gradle:4.1.0' to classpath 'com.android.tools.build:gradle:7.0.1' (upgrade to gradle) and add:
classpath 'com.google.gms:google-services:4.3.3', I don't know if it would make a difference, but I added it because I have another project like this and it's working.