apply plugin retrolambda

build.gradle

@@ -7,9 +7,8 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.6.4'
+        classpath 'me.tatarka:gradle-retrolambda:3.7.0'
 
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
     }
 }