Really enable multidex

Author: samtstern

app/build.gradle

@@ -35,6 +35,7 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile "com.android.support:design:$supportLibraryVersion"
+    compile 'com.android.support:multidex:1.0.1'
 
     compile project(path: ':auth')
     compile project(path: ':database')

app/src/main/java/com/firebase/uidemo/auth/FirebaseUIDemo.java

@@ -1,13 +1,13 @@
 package com.firebase.uidemo.auth;
 
-import android.app.Application;
 import android.content.Context;
+import android.support.multidex.MultiDexApplication;
 import android.support.v7.app.AppCompatDelegate;
 
 import com.squareup.leakcanary.LeakCanary;
 import com.squareup.leakcanary.RefWatcher;
 
-public class FirebaseUIDemo extends Application {
+public class FirebaseUIDemo extends MultiDexApplication {
     private RefWatcher mRefWatcher;
 
     static {