Android: font size in Android should depend on user font scale

On Android settings, a user can choose how big the system font should be.

A good application should be aware of this customization and change accordantly. But Qt Apps just ignore this setting.

The font scale setting propagates in the scaledDensity setting and by using scaledDensity and density the font scale can be found.

Initial experiments were made to change logicalBaseDpi in QHighDpiScaling but that proved to change the size of the layout around the text bigger, but not the text itself.