title: I got this error "error: package com.google.firebase.messaging does not exist"
body: <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'com.neenbedankt.android-apt'
  
  dependencies {
      compile 'com.google.firebase:firebase-ads:9.2.1'
  
  }
  android {
      compileSdkVersion 24
      buildToolsVersion "24.0.3"
      defaultConfig {
          applicationId "com.code.zero.drivermechanicsapp"
          minSdkVersion 15
          targetSdkVersion 24
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }    
      dependencies {
          compile fileTree(dir: 'libs', include: ['*.jar'])
          compile 'com.android.support.constraint:constraint-layout:1.0.0-beta5'
  
          androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
              exclude group: 'com.android.support', module: 'support-annotations'
  
          }) 
  
          compile 'com.android.support:appcompat-v7:24.2.1'
          compile 'com.android.support:design:24.2.1'
          compile 'com.android.support.constraint:constraint-layout:1.0.0-beta5'
          compile 'com.android.support:support-v4:25.2.0'
          compile 'com.android.support:recyclerview-v7:24.2.1'
          compile 'com.google.android.gms:play-services-maps:9.2.0'
          compile 'com.jakewharton:butterknife:8.1.0'
          compile 'com.google.firebase:firebase-database:9.2.0'
          compile 'com.github.Mariovc:ImagePicker:1.0.5'
          //compile 'com.google.firebase:firebase-storage:9.2.0'
          //compile 'com.google.firebase:firebase-auth:9.2.0'
          compile 'com.squareup.picasso:picasso:2.5.2'
          testCompile 'junit:junit:4.12'
          apt 'com.jakewharton:butterknife-compiler:8.1.0'
      }
  }
  </code></pre>
  
  <p>apply plugin: "com.google.gms.google-services"</p>