Reviewing the Gradle build configuration

Review the default Gradle build file (build.gradle) located in 
[project]/android/app to verify the values are correct:

Under the defaultConfig block

Specify the final, unique application ID

Specify the minimum API level on which the app is designed to run.
Defaults to flutter.minSdkVersion.

Specify the target API level on which the app is designed to run.
Defaults to flutter.targetSdkVersion.

A positive integer used as an internal version number. This number
is used only to determine whether one version is more recent than
another, with higher numbers indicating more recent versions.
This version isn’t shown to users.

A string used as the version number shown to users. This setting
can be specified as a raw string or as a reference to a string resource.