[TSD] adds annotations for XBLOCK_SETTINGS

Description

Settings Variable: `XBLOCK_SETTINGS`

Variable usage inside [SettingsService](https://github.com/edx/edx-platform/blob/master/common/lib/xmodule/xmodule/services.py#L13)

Done

Assignee

Robert Raposa

Reporter

Open Source Pull Request Bot

Labels

Contributor Name

Raul Gallegos

Repo

edx/edx-platform

Customer

Epic Link

None

OSCM Assignee

None

Platform Map Area (Levels 1 & 2)

None

Platform Map Area (Levels 3 & 4)

None

Blended Hour Utilization Percentage

None

edX Theme

None

edX Squad

None

Github Lines Added

7

Github Lines Deleted

0

Priority

Unset