The payment in the application depends on the Google Play application, which handles all communication between your application and the Google Play server. In order to use the Google Play app, your app must request the correct permission. You do this by adding com.android.vending.BILLING permission to your AndroidManifest.xml file:
<uses-permission android:name="com.android.vending.BILLING" />
but for
<uses-permission android:name="android.permission.BILLING" />
I don’t see if any value matters if in the latest version of android they don’t have a library for such permissions, without having to use the Google Play application to process billing in the application. Read more here http://developer.android.com/google/play/billing/billing_integrate.html
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