surya: add focal support

Feature matrix update

Device codename: "surya"

Device repository: "https://gitlab.com/ubports/porting/community-ports/android10/xiaomi-poco-x3/xiaomi-surya"

Release channels available: "development"

Default release channel: "development"

When will this update be released to the default release channel? "Released Already"

Notes:

what is added was tested by the users of surya.