Update build.gradle

build.gradle

@@ -6,7 +6,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:2.2.3'
-        classpath 'com.google.gms:google-services:3.0.0'
+        classpath 'com.google.gms:google-services:3.0.0' // Firebase
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files