Update permission group mapping API doc according to API review.

            @PermissionGroupInfoFlags int flags);

    /**

     * Get the platform permissions which belong to a particular permission group.

     * Get the platform-defined permissions which belong to a particular permission group.

     *

     * @param permissionGroupName The permission group whose permissions are desired

     * @param executor Executor on which to invoke the callback

     * @param callback A callback which will receive a list of the platform permissions in the

     *                 group, or empty if the group is not a valid platform group, or there

     *                 was an exception.

     * @param permissionGroupName the permission group whose permissions are desired

     * @param executor the {@link Executor} on which to invoke the callback

     * @param callback the callback which will receive a list of the platform-defined permissions in

     *                 the group, or empty if the group is not a valid platform-defined permission

     *                 group, or there was an exception

     */

    public void getPlatformPermissionsForGroup(@NonNull String permissionGroupName,

            @NonNull @CallbackExecutor Executor executor,

            @NonNull Consumer<List<String>> callback) {}

    /**

     * Get the platform group of a particular permission, if the permission is a platform

     * permission.

     * Get the platform-defined permission group of a particular permission, if the permission is a

     * platform-defined permission.

     *

     * @param permissionName The permission name whose group is desired

     * @param executor Executor on which to invoke the callback

     * @param callback A callback which will receive the name of the permission group this

     *                 permission belongs to, or null if it has no group, is not a platform

     *                 permission, or there was an exception.

     * @param permissionName the permission whose group is desired

     * @param executor the {@link Executor} on which to invoke the callback

     * @param callback the callback which will receive the name of the permission group this

     *                 permission belongs to, or {@code null} if it has no group, is not a

     *                 platform-defined permission, or there was an exception

     */

    public void getGroupOfPlatformPermission(@NonNull String permissionName,

            @NonNull @CallbackExecutor Executor executor, @NonNull Consumer<String> callback) {}