[libadwaita] (4 commits) Non-fast-forward update to branch wip/exalm/dark

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/dark' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  c18eb04... Add AdwStyleManager
  3d4d28a... application: Proxy AdwStyleManager API
  c973228... demo: Set color scheme
  0baef32... demo-window: Remove the dark switcher

Commits added to the branch:

  8f1c3ae... Add AdwStyleManager
  ca5f80d... application: Proxy AdwStyleManager API
  acc1f57... demo: Set color scheme
  206d17d... demo-window: Remove the dark switcher