Allow null filters for foreground dispatch to act as catch all.

import android.content.IntentFilter;

import android.content.pm.IPackageManager;

import android.content.pm.PackageManager;

import android.nfc.tech.TagTechnology;

import android.os.IBinder;

import android.os.RemoteException;

import android.os.ServiceManager;

    /**

     * Enables foreground dispatching to the given Activity. This will force all NFC Intents that

     * match the given filters to be delivered to the activity bypassing the standard dispatch

     * mechanism.

     * mechanism. If no IntentFilters are given all the PendingIntent will be invoked for every

     * dispatch Intent.

     *

     * This method must be called from the main thread.

     *

     * @param activity the Activity to dispatch to

     * @param intent the PendingIntent to start for the dispatch

     * @param filters the IntentFilters to override dispatching for

     * @param filters the IntentFilters to override dispatching for, or null to always dispatch

     * @throws IllegalStateException

     */

    public void enableForegroundDispatch(Activity activity, PendingIntent intent,

            IntentFilter... filters) {

        if (activity == null || intent == null || filters == null) {

        if (activity == null || intent == null) {

            throw new NullPointerException();

        }

        if (!activity.isResumed()) {

    }

    /**

     * Enable NDEF messages push while this Activity is in the foreground.

     * Enable NDEF message push over P2P while this Activity is in the foreground. For this to

     * function properly the other NFC device being scanned must support the "com.android.npp"

     * NDEF push protocol.

     *

     * <p><em>NOTE</em> While foreground NDEF push is active standard tag dispatch is disabled.

     * Only the foreground activity may receive tag discovered dispatches via

     * {@link #enableForegroundDispatch}.

     */

    public void enableForegroundNdefPush(Activity activity, NdefMessage msg) {

        if (activity == null || msg == null) {