[feature request] fa_IR keyboard

```
<subtype
    android:label="@string/label_subtype_generic"
    android:icon="@drawable/icon_en_us"
    android:imeSubtypeLocale="en_US"
    android:imeSubtypeMode="keyboard" />
<subtype
    android:label="@string/label_subtype_generic"
    android:icon="@drawable/icon_en_gb"
    android:imeSubtypeLocale="fa_IR"
    android:imeSubtypeMode="keyboard" />
```