The font weight control now works on every device.

Both bundled faces carry one variable axis, wght, and nothing else — but the app
asked for two, sending an italic axis alongside it. A font with no italic axis
may refuse the whole request rather than the part it cannot honour, and on a
platform that does, every weight drew at Regular with nothing to show for it.
Reported on Android 16.

On Android 7.0 and 7.1, where variable fonts do not exist at all, the heavier
weights were unreachable for a related reason. They now work there too.