Add support for `b5q` (jelly 2)

[igeljaeger]

Is your device already requested?

• [X] I have searched the existing issues

Brand

Unihertz

Name

Jelly 2

Device code

b5q

Model

No response

Device images

- custom ROM https://github.com/Meetoul/android_device_Unihertz_Jelly2_TEE/releases
- no official recovery ROM released

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