Merge "Fix PhoneStateListener constructor javadoc."

    /**

     * Create a PhoneStateListener for the Phone with the default subscription.

     * This class requires Looper.myLooper() not return null. To supply your

     * own non-null looper use PhoneStateListener(Looper looper) below.

     * This class requires Looper.myLooper() not return null.

     */

    public PhoneStateListener() {

        this(SubscriptionManager.DEFAULT_SUB_ID, Looper.myLooper());