user-accounts: Update face images

The faces that are included in the users panel are really old,
the style is outdated and they are too small for modern designs
as well as hidpi screens.

https://bugzilla.gnome.org/show_bug.cgi?id=792243

panels/user-accounts/meson.build

@@ -18,30 +18,21 @@ i18n.merge_file(
 )
 
 image_data = files(
-  'data/faces/astronaut.jpg',
-  'data/faces/baseball.png',
-  'data/faces/butterfly.png',
-  'data/faces/cat-eye.jpg',
-  'data/faces/chess.jpg',
+  'data/faces/bicycle.jpg',
+  'data/faces/book.jpg',
+  'data/faces/calculator.jpg',
+  'data/faces/cat.jpg',
   'data/faces/coffee.jpg',
-  'data/faces/dice.jpg',
-  'data/faces/energy-arc.jpg',
-  'data/faces/fish.jpg',
-  'data/faces/flake.jpg',
   'data/faces/flower.jpg',
-  'data/faces/grapes.jpg',
+  'data/faces/gamepad.jpg',
   'data/faces/guitar.jpg',
-  'data/faces/launch.jpg',
-  'data/faces/leaf.jpg',
-  'data/faces/lightning.jpg',
-  'data/faces/penguin.jpg',
-  'data/faces/puppy.jpg',
-  'data/faces/sky.jpg',
-  'data/faces/soccerball.png',
-  'data/faces/sunflower.jpg',
-  'data/faces/sunset.jpg',
-  'data/faces/tennis-ball.png',
-  'data/faces/yellow-rose.jpg'
+  'data/faces/headphones.jpg',
+  'data/faces/hummingbird.jpg',
+  'data/faces/mountain.jpg',
+  'data/faces/plane.jpg',
+  'data/faces/surfer.jpg',
+  'data/faces/tomatoes.jpg',
+  'data/faces/tree.jpg',
 )
 
 install_data(