title: can't add permission BILLING in XDK
body: <p>I try to add a permission on the corodva build apk file to enable in-app products. I tried to add permission from the project tap -- permission. But each time I upload the apk I can't find the billing permission on the uploaded apk.</p>
  
  <p>I always get that </p>
  
  <pre><code>Required permissions 8 permissions 
  android.permission.ACCESS_NETWORK_STATE
  android.permission.ACCESS_WIFI_STATE
  android.permission.CAMERA
  android.permission.FLASHLIGHT
  android.permission.INTERNET
  android.permission.READ_PHONE_STATE
  android.permission.SEND_SMS
  android.permission.VIBRATE
  </code></pre>
  
  <p>I add the permission </p>
  
  <pre><code>BILLING 
  </code></pre>
  
  <p>and/or </p>
  
  <pre><code>com.android.vending.BILLING 
  </code></pre>
  
  <p>but with no result.</p>
  
  <p>One more thing is that when I open the intelxdk.config.android.xml I found this line </p>
  
  <pre><code>&lt;preference name="android - permission" value="BILLING"/&gt;
  </code></pre>
  
  <p>please note that there is a space in the "android - permission"
  and I can't change that as this file are auto formatted when I build for android.</p>
  
  <p>Many thanks in advance</p>