Modernize and fix compilation

build.gradle

@@ -3,15 +3,15 @@
 buildscript {
     repositories {
         jcenter()
-        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:2.3.3'
     }
 }
 
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }