Make summary appear for both checked and unchecked NFC checkbox in Settings.

And remove the extra "Tag" in the summary.

Bug: 3083079
Change-Id: I998c2556a88180098a060d43b720276a7619a368

src/com/android/settings/nfc/NfcEnabler.java

@@ -91,10 +91,5 @@ public class NfcEnabler implements Preference.OnPreferenceChangeListener {
 
     private void updateUi() {
         mCheckbox.setChecked(mNfcState);
-        if (mNfcState) {
-            mCheckbox.setSummary(null);
-        } else {
-            mCheckbox.setSummary(R.string.nfc_quick_toggle_summary);
-        }
     }
-}
+}