Remove the Photopicker entrypoints from DocumentsUI

import android.graphics.drawable.ColorDrawable;

import android.os.Build;

import android.os.Bundle;

import android.os.ext.SdkExtensions;

import android.provider.DocumentsContract;

import android.provider.MediaStore;

import android.text.TextUtils;

import android.util.Log;

import android.view.ContextMenu;

import java.util.List;

import java.util.Map;

import java.util.Objects;

import java.util.stream.Collectors;

/**

 * Display list of known storage backend roots.

            final List<ResolveInfo> infos = pm.queryIntentActivities(

                    handlerAppIntent, PackageManager.MATCH_DEFAULT_ONLY);

            // In addition to hiding DocumentsUI from possible handler apps, the Android

            // Photopicker should also be hidden. ACTION_PICK_IMAGES is used to identify

            // the Photopicker package since that is the primary API.

            List<ResolveInfo> photopickerActivities;

            List<String> photopickerPackages;

            if (SdkLevel.isAtLeastR()

                    && SdkExtensions.getExtensionVersion(Build.VERSION_CODES.R) >= 2) {

                photopickerActivities = pm.queryIntentActivities(

                        new Intent(MediaStore.ACTION_PICK_IMAGES),

                        PackageManager.MATCH_DEFAULT_ONLY);

                photopickerPackages = photopickerActivities.stream()

                        .map(info -> info.activityInfo.packageName)

                .collect(Collectors.toList());

            } else {

                photopickerActivities = Collections.emptyList();

                photopickerPackages = Collections.emptyList();

            }

            // Omit ourselves and maybe calling package from the list

            for (ResolveInfo info : infos) {

                if (!info.activityInfo.exported) {

                }

                final String packageName = info.activityInfo.packageName;

                // If the package name for the activity is in the list of Photopicker

                // activities, exclude it.

                if (photopickerPackages.contains(packageName)) {

                    continue;

                }

                if (!myPackageName.equals(packageName)

                        && !TextUtils.equals(excludePackage, packageName)) {

                    UserPackage userPackage = new UserPackage(userId, packageName);