Error with admob, couldn't merge andriod manifest files

I have a big problem with connecting google play services and admob, there are two android manifest files and then i am building my project there comes a big problem, i got 4 errors:

First

 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\MainLibProj\AndroidManifest.xml:13] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:
 
 UnityEditor.HostView:OnGUI()

Second

 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\play-services-basement-9.2.1\AndroidManifest.xml:5] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:

 UnityEditor.HostView:OnGUI()

Third

 CommandInvokationFailure: Unable to merge android manifests. See the Console for more details. 
 C:\Program Files\Java\jdk1.8.0_77\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/D/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
 
 stderr[
 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\MainLibProj\AndroidManifest.xml:13] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:
   <meta-data
       @android:name="com.google.android.gms.version"
 --    @android:value="8115000">
   <meta-data
       @android:name="com.google.android.gms.version"
 ++    @android:value="@integer/google_play_services_version">
 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\play-services-basement-9.2.1\AndroidManifest.xml:5] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:
   <meta-data
       @android:name="com.google.android.gms.version"
 --    @android:value="8115000">
   <meta-data
       @android:name="com.google.android.gms.version"
 ++    @android:value="@integer/google_play_services_version">
 ]
 stdout[
 
 ]
 UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
 UnityEditor.Android.AndroidSDKTools.RunCommandInternal (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
 UnityEditor.Android.AndroidSDKTools.RunCommandSafe (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
 UnityEditor.HostView:OnGUI()
 

Last

 Error building Player: CommandInvokationFailure: Unable to merge android manifests. See the Console for more details. 
 C:\Program Files\Java\jdk1.8.0_77\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/D/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
 
 stderr[
 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\MainLibProj\AndroidManifest.xml:13] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:
   <meta-data
       @android:name="com.google.android.gms.version"
 --    @android:value="8115000">
   <meta-data
       @android:name="com.google.android.gms.version"
 ++    @android:value="@integer/google_play_services_version">
 Error: [Temp\StagingArea\AndroidManifest-main.xml:22, C:\Users\D\Desktop\New Project\Temp\StagingArea\android-libraries\play-services-basement-9.2.1\AndroidManifest.xml:5] Trying to merge incompatible /manifest/application/meta-data[@name=com.google.android.gms.version] element:
   <meta-data
       @android:name="com.google.android.gms.version"
 --    @android:value="8115000">
   <meta-data
       @android:name="com.google.android.gms.version"
 ++    @android:value="@integer/google_play_services_version">
 ]
 stdout[
 
 ]

Codes:

/plugins/Android/AndroidManifest.xml (admob)

 <?xml version="1.0" encoding="utf-8"?>
 <!--
 This Google Mobile Ads plugin library manifest will get merged with your
 application's manifest, adding the necessary activity and permissions
 required for displaying ads.
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.admob.demo"
     android:versionName="1.0"
     android:versionCode="1">
   <uses-sdk android:minSdkVersion="9"
       android:targetSdkVersion="19" />
   <!-- Google Mobile Ads Permissions -->
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
   <uses-permission android:name="android.permission.READ_PHONE_STATE" />
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
   <uses-permission android:name="android.permission.ACCESS_COARSE_UPDATES" />
   <!-- Uncomment to add billing for in-app purchase ads -->
   <!--<uses-permission android:name="com.android.vending.BILLING"/> -->
   <application  android:theme="@style/UnityThemeSelector" 
            android:icon="@drawable/app_icon" 
            android:label="@string/app_name" >
    <activity
             android:name="com.unity3d.player.UnityPlayerActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     <!-- Denote the referenced Google Play services version -->
     <meta-data android:name="com.google.android.gms.version"
         android:value="8115000" />
     <!-- Google Mobile Ads Activity -->
     <activity
              android:name="com.google.android.gms.ads.AdActivity"
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
              android:theme="@android:style/Theme.Translucent" />
   </application>
 </manifest>

/plugins/Android/MainLibProj/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- This file was automatically generated by the Google Play Games plugin for Unity
      Do not edit. -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.example.games.mainlibproj"
     android:versionCode="1"
     android:versionName="1.0" >
 
     <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="19" />
 
     <application>
 
      <!-- Required for Nearby Connections API -->
         <meta-data android:name="com.google.android.gms.nearby.connection.SERVICE_ID"
             android:value="689790824620" />
 
         <!-- the space in these forces it to be interpreted as a string vs. int -->
         <meta-data android:name="com.google.android.gms.games.APP_ID"
             android:value="\ 689790824620" />
         <meta-data android:name="com.google.android.gms.games.unityVersion"
             android:value="\ 0.9.34" />
         <meta-data android:name="com.google.android.gms.version"
             android:value="@integer/google_play_services_version" />
 
         <activity android:name="com.google.games.bridge.NativeBridgeActivity"
             android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen" />
     </application>
 </manifest>

So my question is how to merge these two files?