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: I7c9c48ea7f1ad01a02524beabf9d30baa3db891f
Fixes: 67997761
Fixes: 74887543
Test: RunSettingsRoboTests

tests/robotests/src/com/android/settings/testutils/FakeToggleController.java

@@ -36,6 +36,8 @@ public class FakeToggleController extends TogglePreferenceController {
     private final int ON = 1;
     private final int OFF = 0;
 
+    private boolean mIsAsyncUpdate = false;
+
     public FakeToggleController(Context context, String preferenceKey) {
         super(context, preferenceKey);
     }
@@ -67,4 +69,13 @@ public class FakeToggleController extends TogglePreferenceController {
     public boolean isSliceable() {
         return true;
     }
+
+    @Override
+    public boolean hasAsyncUpdate() {
+        return mIsAsyncUpdate;
+    }
+
+    public void setAsyncUpdate(boolean isAsyncUpdate) {
+        mIsAsyncUpdate = isAsyncUpdate;
+    }
 }