Quick gradle config snippet to show how to work around circle ci android build memory issues. This will disable pre-dexing libraries on Circle CI while enabling it locally.

build.gradle

android {
    dexOptions {
        def filecheck = new File( 'local.properties' )
        if (filecheck.exists()) {
            preDexLibraries true
        } else {
            preDexLibraries false
        }
    }
}