Right now we explicitly add ttf-droid to /etc/apk/world, and force
installation of it on every postmarketOS installation. But there really
is no reason to force this from pmbootstrap:
- If ttf-droid is really required for every postmarketOS installation,
it should be a depends of postmarketos-base.
- Even with this change it is still installed on every device,
because postmarketos-splash depends on it.
- There is no need for fonts when using the "none" UI.
For now, the only difference of this change is that we no longer add
ttf-droid explicitly to the APK world. Instead, it is installed as
dependency of postmarketos-splash.