use ACardEmulator as nfc backend for pcsc-relay

This feature is experimental and disabled by default

At ACardEmulator's compile time it is required:
- to add the correct application identifier to aid_list.xml
- enable the connection to pcsc-relay by setting useVPCD

ACardEmulator/app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.vsmartcard.acardemulator" >
 
+
+    <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.NFC" />
     <uses-feature android:name="android.hardware.nfc" android:required="true" />