Add support for `fiji`

### Is your device already requested?

- [x] I have searched the existing issues

### Brand

Google

### Name

Pixel 3a

### Device code

sargo

### Model

G020F

### Device images

```Markdown

```

### 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

```Markdown

```