Add support for `a15`

[hosamasd]

Is your device already requested?

• [X] I have searched the existing issues

Brand

samsung

Name

a15

Device code

sam

Model

a15

Device images

No response

Do you own the device and would be willing to test the installer?

• [X] I own the device and am willing to test the installer on it.

Additional context

No response

[SirRGB]

https://twrp.me/samsung/samsunggalaxya154g.html No rom support tho?