NIAP: Ignore BluetoothKeystoreServiceTest when the User is not primary. am: a2f0655c

package com.android.bluetooth.btservice.bluetoothkeystore;

import android.os.Binder;

import android.os.Process;

import android.util.Log;

import java.io.IOException;

import org.junit.After;

import org.junit.Assert;

import org.junit.Assume;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

    @Before

    public void setUp() {

        Assume.assumeTrue("Ignore test when the user is not primary.", isPrimaryUser());

        mBluetoothKeystoreService = new BluetoothKeystoreService(true);

        Assert.assertNotNull(mBluetoothKeystoreService);

        // backup origin config data.

    @After

    public void tearDown() {

        if (!isPrimaryUser()) {

            return;

        }

        try {

            if (!mConfigData.isEmpty()) {

                Files.write(Paths.get(CONFIG_FILE_PATH), mConfigData);

        mBluetoothKeystoreService = null;

    }

    private static boolean isPrimaryUser() {

        return Binder.getCallingUid() == Process.BLUETOOTH_UID;

    }

    private void overwriteConfigFile(List<String> data) {

        try {

            Files.write(Paths.get(CONFIG_FILE_PATH), data);