Couldn't locate lint-gradle-api-26.1.2.jar for Flutter project

I'm new to Flutter and trying to run the example project when you create a new one. When trying to run it, I have this issue:

FAILURE: Build failed with an exception.

• Where: Build file 'PROJECTPATH/android/app/build.gradle' line: 25

• What went wrong: A problem occurred evaluating project ':app'.

  Could not resolve all files for configuration 'classpath'. Could not find lint-gradle-api.jar (com.android.tools.lint:lint-gradle-api:26.1.2). Searched in the following locations: https://jcenter.bintray.com/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar

I understand it's trying to get the file "lint-gradle-api-26.1.2.jar" from the jcenter repository but when following the link I get this:

{
  "errors" : [ {
    "status" : 404,
    "message" : "Could not find resource"
  } ]
}

So I added the Google repository in my build.gradle file:

buildscript {
    repositories {
        maven { url 'https://dl.google.com/' }
        google()
        jcenter()
    }

...and I also succeed to get the file by following this link:

https://dl.google.com/dl/android/maven2/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar

...but I'm still getting the same error when trying to run my project, whether it is by using Visual Studio Code, Android Studio or with the CLI.

How do I force Gradle to download the file from the link I've found?

Here's how my build.gradle file looks like:

buildscript {
    repositories {
        //maven { url 'https://dl.google.com/dl/android/maven2/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar' }
        repositories {
            google()
            maven { url 'https://maven.fabric.io/public' }
            mavenCentral()
            jcenter()
        }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
    }
}

allprojects {
    repositories {
        google()
        maven { url 'https://maven.fabric.io/public' }
        mavenCentral()
        jcenter()
    }
}

repositories {
    google()
    maven { url 'https://maven.fabric.io/public' }
    mavenCentral()
    jcenter()
}

....

I solved the problem by moving:

maven {
    url 'https://dl.google.com/dl/android/maven2'
}

in the top of:

jcenter()

in the file: .flutter/packages/flutter_tools/gradle/flutter.gradle:

    buildscript {
    repositories {
        maven {
            url 'https://dl.google.com/dl/android/maven2'
        }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
    }
}

Modify flutter.gradle under ./flutter/packages/flutter_tools/gradle to upgrade the tools version to 3.2.1 and add google() to the first line:

buildscript {
  repositories {
    google()
    jcenter()
    maven {
      url 'https://dl.google.com/dl/android/maven'
    }
  }
  dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'
  }
}

Screenshot of my code