AVD - Android Emulator Device Slow Process Solution !

 1. Open <Project>/android/build.gradle

2. add jcenter() and add mavenCentral() before each of them (Make sure to add mavenCenteral() in both spots where jcenter() is found.)

2.1   repositories {

        google()

        mavenCentral() // New line

        jcenter()

       // NOTE: Keep any other entries you may have had here

    }

2.2 allprojects {

    repositories {

        google()

        mavenCentral() // New line

        jcenter()

       // NOTE: Keep any other entries you may have had here

    }