For details on the above steps, see Managing
AVDs.

In Android Virtual Device Manager, click Run in the toolbar.
The emulator starts up and displays the default canvas for your
selected OS version and device.

Agree to Android Licenses

Before you can use Flutter, you must agree to the
licenses of the Android SDK platform. This step should be done after
you have installed the tools listed above.

Make sure that you have a version of Java 11 installed and that your 
JAVA_HOME environment variable is set to the JDK’s folder.

    Android Studio versions 2.2 and higher come with a JDK, so this should
already be done.

Open an elevated console window and run the following command to begin
signing licenses.
    
$ flutter doctor --android-licenses

Review the terms of each license carefully before agreeing to them.