Revert^4 "Removing all restored backups except one so we don't have old backups"

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Objects;

import java.util.stream.Collectors;

public class InvariantDeviceProfile {

        return filteredProfiles;

    }

    /**

     * Returns the GridOption associated to the given file name or null if the fileName is not

     * supported.

     * Ej, launcher.db -> "normal grid", launcher_4_by_4.db -> "practical grid"

     */

    public GridOption getGridOptionFromFileName(Context context, String fileName) {

        return parseAllGridOptions(context).stream()

                .filter(gridOption -> Objects.equals(gridOption.dbFile, fileName))

                .findFirst()

                .orElse(null);

    }

    /**

     * Returns the name of the given size on the current device or empty string if the size is not

     * supported. Ej. 4x4 -> normal, 5x4 -> practical, etc.

     * (Note: the name of the grid can be different for the same grid size depending of

     * the values of the InvariantDeviceProfile)

     *

     */

    public String getGridNameFromSize(Context context, Point size) {

        return parseAllGridOptions(context).stream()

                .filter(gridOption -> gridOption.numColumns == size.x

                        && gridOption.numRows == size.y)

                .map(gridOption -> gridOption.name)

                .findFirst()

                .orElse("");

    }

    /**

     * Returns the grid option for the given gridName on the current device (Note: the gridOption

     * be different for the same gridName depending on the values of the InvariantDeviceProfile).

     */

    public GridOption getGridOptionFromName(Context context, String gridName) {

        return parseAllGridOptions(context).stream()

                .filter(gridOption -> Objects.equals(gridOption.name, gridName))

                .findFirst()

                .orElse(null);

    }

    /**

     * @return all the grid options that can be shown on the device

     */

import androidx.annotation.VisibleForTesting;

import androidx.annotation.WorkerThread;

import com.android.launcher3.Flags;

import com.android.launcher3.InvariantDeviceProfile;

import com.android.launcher3.LauncherAppState;

import com.android.launcher3.LauncherFiles;

import com.android.launcher3.LauncherPrefs;

import com.android.launcher3.LauncherSettings;

import com.android.launcher3.LauncherSettings.Favorites;

        // executed again.

        LauncherPrefs.get(context).removeSync(RESTORE_DEVICE);

        if (Flags.narrowGridRestore()) {

            String oldPhoneFileName = idp.dbFile;

            removeOldDBs(context, oldPhoneFileName);

            trySettingPreviousGidAsCurrent(context, idp, oldPhoneFileName);

        } else {

            idp.reinitializeAfterRestore(context);

        }

    }

    /**

     * Try setting the gird used in the previous phone to the new one. If the current device doesn't

     * support the previous grid option it will not be set.

     */

    private static void trySettingPreviousGidAsCurrent(Context context, InvariantDeviceProfile idp,

            String oldPhoneDbFileName) {

        InvariantDeviceProfile.GridOption gridOption = idp.getGridOptionFromFileName(context,

                oldPhoneDbFileName);

        if (gridOption != null) {

            /*

             * We do this because in some cases different devices have different names for grid

             * options, in one device the grid option "normal" can be 4x4 while in other it

             * could be "practical". Calling this changes the current device grid to the same

             * we had in the other phone, in the case the current phone doesn't support the grid

             * option we use the default and migrate the db to the default. Migration occurs on

             * {@code GridSizeMigrationUtil#migrateGridIfNeeded}

             */

            idp.setCurrentGrid(context, gridOption.name);

        }

    }

    /**

     * Only keep the last database used on the previous device.

     */

    private static void removeOldDBs(Context context, String oldPhoneDbFileName) {

        // At this point idp.dbFile contains the name of the dbFile from the previous phone

        LauncherFiles.GRID_DB_FILES.stream()

                .filter(dbName -> !dbName.equals(oldPhoneDbFileName))

                .forEach(dbName -> {

                    if (context.getDatabasePath(dbName).delete()) {

                        FileLog.d(TAG, "Removed old grid db file: " + dbName);

                    }

                });

    }

    private static boolean performRestore(Context context, ModelDbController controller) {

        SQLiteDatabase db = controller.getDb();