upgrade gradle

app/build.gradle

@@ -43,7 +43,6 @@ android {
 buildscript {
     repositories {
         jcenter()
-        mavenCentral()
     }
     dependencies {
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

arms/build.gradle

@@ -23,7 +23,6 @@ android {
 buildscript {
     repositories {
         jcenter()
-        mavenCentral()
     }
     dependencies {
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:2.3.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

-#Mon Sep 26 10:57:22 CST 2016
+#Wed Mar 15 10:44:29 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip