Could not find multidex.jar (com.android.support:multidex:1.0.2)

To me what worked was to move google() before jcenter() both on buildscript and on allprojects's repositories element.

In your case:

repositories {
    maven {
            url 'https://maven.google.com'
        }
    jcenter()
    // Add your other repositories here
}

I also tried the following and both work for me:

repositories {
    google()
    jcenter()
    // Add your other repositories here
}

Silly Mistake , Just make sure you are using

 maven { url 'https://maven.google.com' }

above

jcenter()

Thats the problem it was throwing Searched in the following locations: https://jcenter.bintray.com/com/android/support/multidex/1.0.2/multidex