am 38533ea5: Merge "NPE in AcitivtyChooserModel." into jb-mr1-dev

import android.content.Intent;

import android.content.pm.ResolveInfo;

import android.database.DataSetObservable;

import android.database.DataSetObserver;

import android.os.AsyncTask;

import android.text.TextUtils;

import android.util.Log;

     * </p>

     *

     * @return An {@link Intent} for launching the activity or null if the

     *         policy has consumed the intent.

     *         policy has consumed the intent or there is not current intent

     *         set via {@link #setIntent(Intent)}.

     *

     * @see HistoricalRecord

     * @see OnChooseActivityListener

     */

    public Intent chooseActivity(int index) {

        synchronized (mInstanceLock) {

            if (mIntent == null) {

                return null;

            }

            ensureConsistentState();

            ActivityResolveInfo chosenActivity = mActivities.get(index);