Upgrade Example project

Example/android/build.gradle

@@ -2,32 +2,23 @@
 
 buildscript {
     repositories {
+        google()
         jcenter()
-        maven {
-            url 'https://maven.google.com/'
-            name 'Google'
-        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
-
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
+        classpath 'com.android.tools.build:gradle:3.1.4'
     }
 }
 
 allprojects {
     repositories {
         mavenLocal()
-        jcenter()
+        google()
         maven {
             // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
             url "$rootDir/../node_modules/react-native/android"
         }
-        maven {
-            url 'https://maven.google.com/'
-            name 'Google'
-        }
+        jcenter()
     }
 }
 

Example/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip