Nfc HAL uses "default" service name

The getService() and registerAsService() methods of interface objects
now have default parameters of "default" for the service name. HALs
will not have to use any service name unless they want to register
more than one service.

Test: builds; verify HAL still works

In support of b/33844934

Change-Id: Id7b76e1df98e1ecacb530a1b5fec76bf14ba6eb7
diff --git a/nfc/1.0/default/service.cpp b/nfc/1.0/default/service.cpp
index 32f9c28..731acd5 100644
--- a/nfc/1.0/default/service.cpp
+++ b/nfc/1.0/default/service.cpp
@@ -9,5 +9,5 @@
 using android::hardware::defaultPassthroughServiceImplementation;
 
 int main() {
-    return defaultPassthroughServiceImplementation<INfc>("nfc_nci");
+    return defaultPassthroughServiceImplementation<INfc>();
 }