Setup Google plugin & config file

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/build.gradle

@@ -134,3 +134,5 @@ dependencies {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
 }
+
+apply plugin: 'com.google.gms.google-services'

build.gradle

@@ -15,6 +15,7 @@ buildscript {
         classpath 'com.android.tools.build:gradle:3.0.0'
         classpath 'eu.davidea:grabver:0.6.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}"
+        classpath 'com.google.gms:google-services:3.1.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files