MSIM : Show a proper text if no number is set

    <string name="qs_advanced_location_title">Advanced location settings</string>

    <string name="qs_advanced_location_summary">Enable advanced settings for location in Quick Settings</string>

    <string name="sim_no_number_set">No number assigned</string>

    <!-- Gesture Settings -->

    <!-- Settings main menu entry -->

    <string name="gesture_settings_title">Gestures</string>

import android.telephony.SubscriptionManager;

import android.telephony.SubscriptionInfo;

import android.telephony.TelephonyManager;

import android.text.TextUtils;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

        logd("update() isSubValid "  + isSubValid);

        if (isSubValid) {

            String number = TextUtils.isEmpty(mSir.getNumber())

                    ? getContext().getString(R.string.sim_no_number_set)

                    : mSir.getNumber();

            setSummary(getContext().getString(R.string.sim_settings_summary,

                    getSimDisplayName(), mSir.getNumber()));

                    getSimDisplayName(), number));

            setIcon(new BitmapDrawable(getContext().getResources(),

                    mSir.createIconBitmap(getContext())));