Xiaomi Redmi 9A config

[its-theo]

Please add this :)

`$schema: https://json-schema.org/draft/2020-12/schema
$id: "_.schema.yml"
title: "UBports Installer Config"
description: "Device configuration for the UBports Installer"
type: "object"
properties:
name: "Xiaomi Redmi 9A"
codename: "redmi-9a"
formfactor:
brand: "Xiaomi"
model: "Redmi 9A"
physical: "smartphone"
aliases: ["mi-redmi9a"]
doppelgangers: []
user_actions: {}
handlers:
bootloader_locked:
title: Handle a bootloader locked error
command: "fastboot oem unlock"
unlock: ["unlock_bootloader"]
operating_systems:
- version: "20.04"
rootfs: "ubuntu_touch_arm64.img.xz"
channel: "stable"
required:

• "name"
• "codename"
• "operating_systems"
• "formfactor"
  additionalProperties: false
  `

[JamiKettunen]

Please make a new pull request, no one adds new code from an issue tracker.