Refactor nfc preference controller

- Remove BaseNfcPreferenceController.
- NfcPreferenceController inherit from TogglePreferenceController.
- AndroidBeamPreferenceController inherit from BasePreferenceController.
- Override getIntentFilter in NfcPreferenceController to listen changes.
- Add an API (hasAsyncUpdate) into BasePreferenceController to
distinguish the setting which is updated asynchronously.

Change-Id: I1abe4410169e305a0d6106e24c54e7f2e763fc91
Merged-In: I7c9c48ea7f1ad01a02524beabf9d30baa3db891f
Fixes: 67997761
Fixes: 74887543
Test: RunSettingsRoboTests

src/com/android/settings/core/BasePreferenceController.java

@@ -246,6 +246,16 @@ public abstract class BasePreferenceController extends AbstractPreferenceControl
         return false;
     }
 
+    /**
+     * @return {@code true} if the setting update asynchronously.
+     * <p>
+     * For example, a Wifi controller would return true, because it needs to update the radio
+     * and wait for it to turn on.
+     */
+    public boolean hasAsyncUpdate() {
+        return false;
+    }
+
     /**
      * Updates non-indexable keys for search provider.
      *