ImsPhoneCallTrackerTest: add missing imports

package com.android.internal.telephony.imsphone;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.os.HandlerThread;

import android.os.Message;

import android.telecom.VideoProfile;

import android.telephony.PhoneNumberUtils;

import android.test.suitebuilder.annotation.SmallTest;