AndroidManifest android:allowBackup="true", Cannot replace to false

HI, I've posted this on answerhub but no-one seems to know how to fix it so ill try here.

Basically i want to set android:allowBackup="false".

I am doing so in the Plugins/Android/GoogleMobileAdsPlugin/

Doing so on it's own gives the message saying application@allowBackup=true in :GoogleMobileAdsPlugin collides with another value (see console for details)

I have followed the console guidelines to add the tools replace

Code (CSharp):

1. <?xml version="1.0" encoding="utf-8"?>
2. <!--
3. This Google Mobile Ads plugin library manifest will get merged with your
4. application's manifest, adding the necessary activity and permissions
5. required for displaying ads.
6. -->
7. <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
8.    package="com.google.unity.ads"
9.    android:versionName="21"
10.    android:versionCode="21">
11.  <uses-sdk android:minSdkVersion="14"
12.      android:targetSdkVersion="19" />
13.      <application android:allowBackup="false" tools:replace="android:allowBackup">
14.    <uses-library android:required="false" android:name="org.apache.http.legacy"/>
15.    <!-- Your AdMob App ID will look similar to this sample ID: ca-app-pub-3940256099942544~3347511713 -->
16.    <meta-data
17.    android:name="com.google.android.gms.ads.APPLICATION_ID"
18.    android:value=""/>
19.  </application>
20.  <uses-permission android:name="com.android.vending.BILLING" />
21. </manifest>

After trying to build with this i get the same error, saying i should use the tools:replace.

I have opened and checked all manifest files inside my project and nowhere does android:allowBackup="true" in the normal manifest, however it does appear in the final manifest when the project is built which i can obviously not edit.

Does anyone have any insight on why this happens, what's setting it to try and how i can change it?

Thanks

EDIT:
Attached screenshot of errors.

 

Anyone? any help would be greatly appreciated.

 

Were you able to fix this?
I have the same issue with an android build.
I already added this step
Set in AndroidManifest.xml::
<application tools:replace="allowBackup" android.allowBackup="false"/>
But I get build errors.

I changed the value of allowBackup to True in this file
\Library\Bee\Android\Prj\IL2CPP\Gradle\unityLibrary\src\main - AndroidManifest.xml

Still no luck.

 

Which errors? For me visual studio was able to fix it with it's suggestion