Upload fails on google play even after adding android:debuggable=“false”

I am trying to upload my apk to the google store and it says You uploaded a debuggable APK. For security reasons you need to disable debugging before it can be published in Google Play.

I have added android:debuggable="false" and i am signing it in release mode with a unique key still I am getting the error. I am building using xamarin, this is my appmanifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.mycomApp.MyApp" android:versionCode="1" android:versionName="1.0" android:installLocation="auto">
    <application android:label="MyApp" android:icon="@drawable/Icon" android:hardwareAccelerated="true" android:debuggable="false">
        <activity android:name=".MainActivity" android:label="MainActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"></activity>
        <!-- Only C2DM servers can send messages for the app. If permission is not set - any other app can generate it -->
    </application>
    <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="14" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_CALENDAR" />
    <uses-permission android:name="android.permission.WRITE_CALENDAR" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.READ_OWNER_DATA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>