Add api txt files for nfc-extras

package com.android.nfc_extras {

  public class EeAlreadyOpenException extends com.android.nfc_extras.EeIOException {

    ctor public EeAlreadyOpenException();

    ctor public EeAlreadyOpenException(java.lang.String);

  }

  public class EeExternalFieldException extends com.android.nfc_extras.EeIOException {

    ctor public EeExternalFieldException();

    ctor public EeExternalFieldException(java.lang.String);

  }

  public class EeIOException extends java.io.IOException {

    ctor public EeIOException();

    ctor public EeIOException(java.lang.String);

  }

  public class EeInitializationException extends com.android.nfc_extras.EeIOException {

    ctor public EeInitializationException();

    ctor public EeInitializationException(java.lang.String);

  }

  public class EeListenModeException extends com.android.nfc_extras.EeIOException {

    ctor public EeListenModeException();

    ctor public EeListenModeException(java.lang.String);

  }

  public class EeNfcDisabledException extends com.android.nfc_extras.EeIOException {

    ctor public EeNfcDisabledException();

    ctor public EeNfcDisabledException(java.lang.String);

  }

  public final class NfcAdapterExtras {

    method public void authenticate(byte[]);

    method public static com.android.nfc_extras.NfcAdapterExtras get(android.nfc.NfcAdapter);

    method public com.android.nfc_extras.NfcAdapterExtras.CardEmulationRoute getCardEmulationRoute();

    method public java.lang.String getDriverName();

    method public com.android.nfc_extras.NfcExecutionEnvironment getEmbeddedExecutionEnvironment();

    method public void setCardEmulationRoute(com.android.nfc_extras.NfcAdapterExtras.CardEmulationRoute);

    field public static final java.lang.String ACTION_RF_FIELD_OFF_DETECTED = "com.android.nfc_extras.action.RF_FIELD_OFF_DETECTED";

    field public static final java.lang.String ACTION_RF_FIELD_ON_DETECTED = "com.android.nfc_extras.action.RF_FIELD_ON_DETECTED";

  }

  public static final class NfcAdapterExtras.CardEmulationRoute {

    ctor public NfcAdapterExtras.CardEmulationRoute(int, com.android.nfc_extras.NfcExecutionEnvironment);

    field public static final int ROUTE_OFF = 1; // 0x1

    field public static final int ROUTE_ON_WHEN_SCREEN_ON = 2; // 0x2

    field public final com.android.nfc_extras.NfcExecutionEnvironment nfcEe;

    field public final int route;

  }

  public class NfcExecutionEnvironment {

    method public void close() throws java.io.IOException;

    method public void open() throws com.android.nfc_extras.EeIOException;

    method public byte[] transceive(byte[]) throws java.io.IOException;

    field public static final java.lang.String ACTION_AID_SELECTED = "com.android.nfc_extras.action.AID_SELECTED";

  }

}