Update signature files to the new format

The new format is described in tools/metalava/FORMAT.md.

Fixes: 116589402 Switch signature files over to the v2 format
Fixes: 112626813 Drop "synchronized" modifier from the signature format
Fixes: 122358225 Omit overriding methods that only differ in final [...]
Fixes: 73088715 API Review: Need doclava to output nullability
Fixes: 79739773 API Review: Metalava enforcing constants are constant
Exempt-From-Owner-Approval: Large-scale tooling change
Test: make sdk, make update-api, make checkapi
Change-Id: Ia248aece5250e84e47c815c601133b698bf644c2
diff --git a/nfc-extras/api/current.txt b/nfc-extras/api/current.txt
index 066b7b5..47ccddf 100644
--- a/nfc-extras/api/current.txt
+++ b/nfc-extras/api/current.txt
@@ -1,44 +1,45 @@
+// Signature format: 2.0
 package com.android.nfc_extras {
 
   public class EeAlreadyOpenException extends com.android.nfc_extras.EeIOException {
     ctor public EeAlreadyOpenException();
-    ctor public EeAlreadyOpenException(java.lang.String);
+    ctor public EeAlreadyOpenException(String);
   }
 
   public class EeExternalFieldException extends com.android.nfc_extras.EeIOException {
     ctor public EeExternalFieldException();
-    ctor public EeExternalFieldException(java.lang.String);
+    ctor public EeExternalFieldException(String);
   }
 
   public class EeIOException extends java.io.IOException {
     ctor public EeIOException();
-    ctor public EeIOException(java.lang.String);
+    ctor public EeIOException(String);
   }
 
   public class EeInitializationException extends com.android.nfc_extras.EeIOException {
     ctor public EeInitializationException();
-    ctor public EeInitializationException(java.lang.String);
+    ctor public EeInitializationException(String);
   }
 
   public class EeListenModeException extends com.android.nfc_extras.EeIOException {
     ctor public EeListenModeException();
-    ctor public EeListenModeException(java.lang.String);
+    ctor public EeListenModeException(String);
   }
 
   public class EeNfcDisabledException extends com.android.nfc_extras.EeIOException {
     ctor public EeNfcDisabledException();
-    ctor public EeNfcDisabledException(java.lang.String);
+    ctor public EeNfcDisabledException(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 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";
+    field public static final String ACTION_RF_FIELD_OFF_DETECTED = "com.android.nfc_extras.action.RF_FIELD_OFF_DETECTED";
+    field public static final String ACTION_RF_FIELD_ON_DETECTED = "com.android.nfc_extras.action.RF_FIELD_ON_DETECTED";
   }
 
   public static final class NfcAdapterExtras.CardEmulationRoute {
@@ -53,7 +54,7 @@
     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";
+    field public static final String ACTION_AID_SELECTED = "com.android.nfc_extras.action.AID_SELECTED";
   }
 
 }