Format callback phone number.

import android.support.annotation.Nullable;

import android.support.v4.view.ViewCompat;

import android.telephony.PhoneNumberUtils;

import android.text.BidiFormatter;

import android.text.TextDirectionHeuristics;

import android.text.TextUtils;

import android.view.View;

import android.view.accessibility.AccessibilityEvent;

    // This is used for carriers like Project Fi to show the callback number for emergency calls.

    deviceNumberTextView.setText(

        context.getString(

            R.string.contact_grid_callback_number, primaryCallState.callbackNumber()));

            R.string.contact_grid_callback_number,

            BidiFormatter.getInstance()

                .unicodeWrap(primaryCallState.callbackNumber(), TextDirectionHeuristics.LTR)));

    deviceNumberTextView.setVisibility(View.VISIBLE);

    if (primaryInfo.shouldShowLocation()) {

      deviceNumberDivider.setVisibility(View.VISIBLE);