google play services not up to date
<p>I am attempting to integrate google admob in my android studio app.  I get the following messages in my log (I apologize for the formatting and would greatly appreciate any assistance):</p>

<pre><code>05-30 01:23:47.389 19555-19555/com.example.livingstonlabs.whatsbest I/Ads: Starting ad request.
05-30 01:23:47.430 19555-25051/com.example.livingstonlabs.whatsbest W/GooglePlayServicesUtil: Google Play services out of date.  Requires 9080000 but found 8489470
05-30 01:23:47.430 19555-25051/com.example.livingstonlabs.whatsbest W/Ads: Failed to connect to remote ad request service.
05-30 01:23:47.430 19555-25051/com.example.livingstonlabs.whatsbest W/Ads: Could not start the ad request service.
05-30 01:23:47.505 19555-19555/com.example.livingstonlabs.whatsbest W/GooglePlayServicesUtil: Google Play services out of date.  Requires 9080000 but found 8489470
</code></pre>

<p>I am assuming my google play services are for some reason out of date but I cannot see why that would be. I ave "apply plugin: 'com.google.gms.google-services'" at the end. </p>

<p><strong>build.gradle(project)</strong></p>

<pre><code>buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
        classpath 'com.google.gms:google-services:3.0.0'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}


apply plugin: 'com.android.application'
</code></pre>

<p>****build.gradle(Module:app)****</p>

<pre><code>android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.livingstonlabs.whatsbest"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.google.firebase:firebase-core:9.0.0'
    compile 'com.google.firebase:firebase-database:9.0.0'
    compile 'com.google.firebase:firebase-ads:9.0.0'
    compile 'com.google.android.gms:play-services:9.0.0'


}
apply plugin: 'com.google.gms.google-services'
</code></pre>